
Tamara J. answered 12/04/12
Math Tutoring - Algebra and Calculus (all levels)
How you have the equation set up is a bit unclear, but I'm assuming it looks like the following:
(x+2) / 2(x-2) = 2/3
Here, we have an unknown variable, x, which we are looking to solve for.
First, distribute the 2 in the denominator of the fraction on the left hand side of the equation:
(x + 2) / (2·x - 2·2) = 2/3
(x + 2) / (2x - 4) = 2/3
Now we can cross multiply:
3·(x + 2) = 2·(2x - 4)
3·x + 3·2 = 2·2x - 2·4
3x + 6 = 4x - 8
Move all terms with the variable x to one side of the equation and all other terms to the other side, then combine like terms and solve for x:
3x + 6 = 4x - 8
- 3x - 3x
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0 + 6 = 1x - 8 ==> 6 = x - 8
+ 8 + 8
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14 = x