Chapter 10 - Systems of Equations and Inequalities - Section 10.1 Systems of Linear Equations: Substitution and Elimination - 10.1 Assess Your Understanding - Page 734: 8

See below.

1. To verify the values are solutions to the first equation, plugin the numbers, we have $LHS=3(-2)+2(4)=-6+8=2=RHS$ 2. To verify the values are solutions to the second equation, plugin the numbers, we have $LHS=(-2)-7(4)=-2-28=-30=RHS$