young solves the equation -2z - 7 = -19 and gets z = 6

Question

which best shows how he checked his answer

2(6) - 7

-12 - 7
-19
-2(6) - 7 -12 - 7 -19
-2(6) - 7

4 - 7
-19
-2(6) - 7 4 - 7 -19
-2(6) - 7

-12 - (-7)
-19
-2(6) - 7 -

12 - (-7)
-19
-2(6) - 7

-12 + 7
-19

Answer 1

The best way to check his answer is by plugging the value of z back into the original equation and ensuring that it balances out. This is shown as: 2(6) - 7 = -12 - 7 = -19. So, Young correctly solved the equation.