Homework Study Helpers! =P discussion

Any questions about equations, variables blablabla...just ask here =)

Sorry! I SUCK at Algebra..... sad really =(

I think I can help with this, just give me a moment

I have a sort of like algebra for 7th grade, then I will take algebra in 8th.

Ok, so this is how I would solve it, though Im not sure if this is what your teacher wants.

I'd cross multiply.

s-3/7= s+5/9

so that would be:

s-3 x 9 = s+5 x 7

multiply those and you get:

9s-27 = 7s + 35

Then just simplify until you figure out the value of "s"

Does that help?

You lost me at s-3/7= s+5/9 ...

I swear I have a mental block against math. lol (unless we're talking $$)

Ok here it is

You have you ecuation and you wanna know what s is right? And to get the value of s you have to get rid of all the numbers

S-3/7 = s+5/9

Now you have fractions so the number on the bottom is dividing the one on the top so if you pass it to the other side it becomes a multiplication

S- 3 x 9 (9 was dividing 5) = s + 5 x 7 (7 was dividing 3 on the other side)

Now you multiply the last number you added (aka 9 and 7) times s - 3 and s + 5

ex:

You multipli 9 x s = 9s then multiply 9 x -3 = -27
Multiply 7 x s = 7s then 5 x 7 = 35

And this is your ecuation: 9s - 27 = 7s + 35

Now you have to get all of the s on one side and the normal numbers on the other

9s - 7s = 35 + 27 ( notice that the ones I changes sides change symbols ex: 7s became -7s)

Then you solve it like any other one

2s = 62

And then you take the number beside the s and pass it to the other side ( and since it was multiplying the s then it pases as a divider)

S= 62/2

And the answer is....

S=31 :D

Is it clear??

I just double-checked my method and I got 31 as the answer as well. Yay! I got something right LOL

Andrea (Dru) wrote: "Ok here it is

You have you ecuation and you wanna know what s is right? And to get the value of s you have to get rid of all the numbers

S-3/7 = s+5/9

Now you have fractions so the number..."

So your method is correct except for one error:
S- 3 x 9 (9 was dividing 5) = s + 5 x 7 (7 was dividing 3 on the other side)

if you do something to one side you have to do it to the other side too, exactly the same way so you would solve the problem like this:

s-3/7= s+5/9

multiply on both sides:
63(s-3/7) = 63(s+5/9)
You multiply by 63 because what you do to one side you do exactly the same on the other side so in order to get rid of the denominators on both sides you have to multiply by a common multiple of 7 and 9 and the LCM is 63.

63s - 27 = 63s + 35

now put the variable on the same side, and the integers on the same side

0s = 62

0 = 62

answer is no solution

But I used a different method and got the same answer as Andrea, so...

Scarlet wrote: "But I used a different method and got the same answer as Andrea, so..."

Yours was the same method just explained differently

Nate wrote: "You lost me at s-3/7= s+5/9 ...

I swear I have a mental block against math. lol (unless we're talking $$)"

Dude I'm the EXACT same!

I kind of actually like algebra. :) But I think that's just cause the equations remind me of puzzles and I love puzzle games. C:

I love algebra!!!
I took Algebra 1 last year, and I'm about to finish Geometry.
Geometry is pretty fun, but I liked Algebra better. I can't wait for Algebra 2 next year...

I'm sorry. Kind of a nerd...

Haha, that's cool. I'm taking Algebra 1 this year, then Geometry next year if I remember right. :3

Erin wrote: "Scarlet wrote: "But I used a different method and got the same answer as Andrea, so..."

Yours was the same method just explained differently"

hmm..well Im still pretty sure the answer is 31..if Im wrong then Im wrong but Im pretty sure...

I know the concept of "what you do to one side, you do to the other," but that's not what you do when you cross multiply.

Erin wrote: "Andrea (Dru) wrote: "Ok here it is

You have you ecuation and you wanna know what s is right? And to get the value of s you have to get rid of all the numbers

S-3/7 = s+5/9

Now you have fraction..."


forgive me if I did it wrong I was actually on my cellphone when I solved it so let me check it

Erin wrote: "Andrea (Dru) wrote: "Ok here it is

You have you ecuation and you wanna know what s is right? And to get the value of s you have to get rid of all the numbers

S-3/7 = s+5/9

Now you have fraction..."

Actually checked it and my method is correct. If in the ecuation you substitute s for 31 and solve it you get this:

31.57 = 31.56

they're aproximately equal so it is correct

I hope we didn't just make Ingrid VERY confused haha

I know, lol sorry Ingrid. I have this procedure in my notebook and I just proved it correct so she can do either this one or Erin's

my calculator is my new bff. i name her alison. you are to do my hw. GET TO WORK!

think i was too harsh on her?

Just a little...but I treat mine the same way muahahha

....... Now i feel bad! I've had my calculator all year and haven't named her! But I neglect it often, anyways. >:D

she is used to it i think. *looks over to calculator crying in corner* darn. maybe she doesn't like the name alison.

Maybe she's a he?

Ok i haz a geo question

whoops this is algebra..*switching threads*

Elese wrote: "Maybe she's a he?"

totally didn't think of that-
hey calc! wanna be called fred?
*calculator gets up and hugs me even tho it doesnt have arms*
thanks!

My calc's name is cleopatra!

queen of the nile.

Aww! Now I wanna name mine George. -looks evilly towards backpack-

Haha, no prob. I can imagine 'Fred's little arms sticking out of his case. XD

omigod george. *glances at Sara nervously*

oh no no no you do NOT name your sweet nice calculator george. that name is reserved for elephant rapers. just saying.

Hehehe. ;) I proclaim my calculator's name is George~!
:D It reminds me of the fish in the library I named.

Wait- what? -confused- My calculator can't rape elephants! (at least, i hope so. -shudder-)

If I had to give my calculator a name it would not be one I would repeat on here.

I take it you dislike your calculator a great deal? (or love it a great deal, but we don't need to know that. XD)

Elese wrote: "I take it you dislike your calculator a great deal? (or love it a great deal, but we don't need to know that. XD)"

the former and I dispise MATH.

Sara wrote: "oh no no no you do NOT name your sweet nice calculator george. that name is reserved for elephant rapers. just saying."

bahahahahhaah omg XD

who doesnt like their calculator? i dropped my calculator one time and all the "inner workings" started leaking out but i still kept it because you cant just throw out a bf because it is broken. and leaking wires. but that would be creepy if your friend started leaking wires.

Nate doesn't.
Aww, math is okay sometimes.
.......... Is it bad that I can imagine that and don't feel bad about it? :)

about wut? ur friend leaking wires? you know here's the normal thing- i cant even imagine my friend leaking wires and i can imagine some pretty scary stuff.

AGHH THE IMAGES NOOOOOOOOO

Yup, sorta. I can imagine others leaking wires. They sorta scare me. D:

Hm... Funky. (not bad, promise.) Yeah, I can imagine some weird stuff. But it's not all scary.

Elese wrote: "Yup, sorta. I can imagine others leaking wires. They sorta scare me. D:

Hm... Funky. (not bad, promise.) Yeah, I can imagine some weird stuff. But it's not all scary."

that is talent my friend.

Imagining wires coming out of others? Or imagining other things? Either way, thank you! :D

Elese wrote: "Imagining wires coming out of others? Or imagining other things? Either way, thank you! :D"

the first one. not a very common talent you have. treasure it.

Any calculator I've ever had has always semmed to break up with me when I need it most =(
Lets see Ive had-
bob,larry,charlie,betty, ect.
Right now I have my phone, his name is Carl jr.
and NO I did not get it from that fast food place lol

Haha