FFR, quick help, plz? Math/test tomorrow/lost

[Shadowcliff]

I have an algebra (II) test tomorrow.
I'm at a loss.
Comepletely drew a blank on addition/subtraction problems.
I know that if I figure out just one it won't be a problem.

Here's an example:

(4/3z)+(2/z)=(5/6)

Found the LCD, 6z. Then what?

Thanks.

[Relambrien]

Re: FFR, quick help, plz? Math/test tomorrow/lost

For future reference, you can go to this subforum if you want academic or homework help: http://www.flashflashrevolution.com/...splay.php?f=68

[Patashu]

Re: FFR, quick help, plz? Math/test tomorrow/lost

Here's how I'd solve it:
(4/3z)+(2/z)=(5/6)
Multiply all terms by z.
4/3 + 2 = (5/6)*z
Divide both sides by 5/6.
(6/5)*(4/3+2) = z

[who_cares973]

Re: FFR, quick help, plz? Math/test tomorrow/lost

patashu isnt a math major he doesnt know what he's doing dont listen to him

[rushyrulz]

Re: FFR, quick help, plz? Math/test tomorrow/lost

common denominator is 3x after multiplying (2/x) by (3/3)
You should then have (4/3x)+(6/3x)=5/6 which is equal to (10/3x)=5/6
Then multiply both sides by 3x to get it out of the denominator and you should get 10=(15x/6).
Multiply both sides by 6 to get 60=15x

I think you can solve it from here.

Oh, and I switched the zs with xs because variable z confuses me and should never be a variable >.<

[Jtehanonymous]

Re: FFR, quick help, plz? Math/test tomorrow/lost

Did you try integrating? :/

This is how I'd try it:
(4/3z)+(2/z)=(5/6)

Multiply everything by 6z.

8 + 12 = 5z

20 = 5z

4 = z

[Shadowcliff]

Re: FFR, quick help, plz? Math/test tomorrow/lost

Thanks Relambrien, and jtehanonymous, that's just was I was looking for. I get it now.

Haha. I swear I'm not stupid. We're way ahead of this, but it's showing up in a test tomorrow and somehow it got flushed out of my brain.

[rushyrulz]

Re: FFR, quick help, plz? Math/test tomorrow/lost

Thanks Relambrien, and jtehanonymous, that's just was I was looking for. I get it now.

You're welcome >.<

[Shadowcliff]

Re: FFR, quick help, plz? Math/test tomorrow/lost

You're welcome >.<

Sorry, his was a little simpler D:
It was more like what my teacher would expect.