please help. asap
thanks

Answer:
x= - 6 (c)
Step-by-step explanation:
f(x)= 2/3x + 7
x f(x)
-12 -1
-9 1
-6 3
-3 5
g(x) = 2x+15
x f(x)
-12 -9
-9 -3
-6 3
-3 9
answer is x = -6