Answer:
x - 7/9 = f(x)^-1
Step-by-step explanation:
f(x) = 9x + 7
y - 7 = 9x
y - 7/9 = 9x/9
Interchange!
x - 7/9 = y
oop
- 12/4
3 - (-9) / (-10) + 6
3 + 9 / (-4)
12 / (-4)