### Home > MC2 > Chapter Ch7 > Lesson 7.1.3 > Problem 7-30

7-30.

Once you have found an answer, substitute it for *x* in the original equation to check if you are correct.

*x* = −8

*x* = −15

7-30.

Once you have found an answer, substitute it for *x* in the original equation to check if you are correct.

*x* = −8

*x* = −15