Find A

[nycmathguy]

College Algebra
Section R.7

Let me see.

The first-two steps are as follows:

1. Add the left side.
2. Cross-multiply to find A.

You say?

 

[MathLover1]

you need A, so isolate term that contains A
A/(x+2)=(12x-1)/(x^2-x-6) -7/(x-3).......subtract terms on right side and you get 5/(x + 2)
A/(x+2)=5/(x + 2)
A=(x+2)*5/(x + 2) ......simplify

A=5

 

[nycmathguy]

you need A, so isolate term that contains A
A/(x+2)=(12x-1)/(x^2-x-6) -7/(x-3).......subtract terms on right side and you get 5/(x + 2)
A/(x+2)=5/(x + 2)
A=(x+2)*5/(x + 2) ......simplify

A=5

Perfect. Thanks. Easy.