##### I need help solving three algebra problems

 Algebra Tutor: None Selected Time limit: 1 Day

I need to understand the steps to solving the following three algebra problems:

(4x-5)/(2-x) = - (9/2)           9x/4  +  7/8  = 4x - 3         x/88 -21 = 3x - 18

It's obvious I have trouble doing work with fractions.  I need to understand each step.

Aug 29th, 2015

4X-5/2-X=-9/2

Cross multiply you get

2(4X-5)=-9(2-X)

Open brackets

8X-10=-18+9X

Collect like terms

-10+18=9X-8X

SOLVE

X=8

9x/4  +  7/8  = 4x - 3

Collect like terms

9X/4-4X=-3-7/8

SOLVE

-7X/16=-30/8

8*7X=30*16

7X=60

X=8 4/60

X=8 1/15

x/88 -21 = 3x - 18

collect like terms

x/88-3X=-18+21

-263X/88=3

-263X= 264

X=-264/263

X=-1  1/263

Aug 29th, 2015

I don't understand the second problem's steps.   The answer is suppose to be 2.21.  How did you get -30/8.

I get    -7x/4 = -31/8    Then cross multiplying will lead the 2.21 as the answer.

Aug 29th, 2015

sorry, its true -7-23=-31

-7X/4=-31/8

-7X*8=-31*4

X=2.21

THANKS

Aug 29th, 2015

Thanks for your help.  I love Legolas!  I'm done!

Aug 29th, 2015

Welcome

Aug 29th, 2015

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Aug 29th, 2015
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Aug 29th, 2015
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