Question

How do you combine `5/(12+4x) - 7/(9+3x)`?

Answer 1

`=-13/(36+12x)`

Explanation:

Write as:`5/(4(3+x)) -7/(3(3+x))`

`1/(3+x)(5/4-7/3)" "=" "-13/(12(3+x))`

`=-13/(36+12x)`