STEPS:
1. Start my distributing the 8 through the parentheses on the left side of the equation. 8 times 2x is 16x and 8 times 9 is 72. So we have 16x + 72 = 56.
2. Next, isolate the x-term by adding 72 to both sides of the equation
and we get 16x = -16.
3. Divide both sides by 16 and x = -1.
