### Home > CAAC > Chapter 6 > Lesson 6.1.1 > Problem 6-9

6-9.

Set the two equations equal to each other.

Solve for *b*.

12*b* + 3 = −2*b* − 4

14*b* = −7

Substitute *b* back into one of the original equations to find *a*.

Remember to check by substituting *a* and *b* back into both of the original equations.

*a* = −6 + 3

*a* = −3