Answer:
x = 1
Step-by-step explanation:
g(x) = 2x + 7
g(x) = 9
9 = 2x + 7
Subtract 2x on both sides
9 - 2x = 7
Subtract 9 on both sides
-2x = 7 - 9
Simplify
-2x = -2
Divide by -2 on both sides
Cross check
9 = 2(1) + 7
9 = 9
