Answer:
a=17
Step-by-step explanation:
Simplifying
2(a + -8) = 18
Reorder the terms:
2(-8 + a) = 18
(-8 * 2 + a * 2) = 18
(-16 + 2a) = 18
Solving
-16 + 2a = 18
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '16' to each side of the equation.
-16 + 16 + 2a = 18 + 16
Combine like terms: -16 + 16 = 0
0 + 2a = 18 + 16
2a = 18 + 16
Combine like terms: 18 + 16 = 34
2a = 34
Divide each side by '2'.
a = 17
