Answer:
4
Step-by-step explanation:
You set f(x) = 9 and solve from there.
9 = 4x - 7
+7 +7
16 = 4x
/4 /4
x = 4
Answer:
The answer is 4
Step-by-step explanation:
f(x)=4x-7
f(x)=9
9=4x-7
9+7=4x-7+7
(the -7 and the +7 cancel out, and remember: whatever you do the one side you have to do to the other)
16=4x
(divide by 4 to isolate x and do the same to the other side of the equation so you get the answer)
so, x=4
