### Home > PC > Chapter 4 > Lesson 4.2.2 > Problem 4-91

4-91.

Isolate the *x* on the left side by subtracting 7 from both sides.

Factor out an '*x*' on the left side.

Divide both sides by *x*'s factor solving for *x*.

*a*^{2}*x* + *b*^{2}*x* = 3*c* − 7

*x*(*a*^{2} + *b*^{2}) = 3*c* − 7