The answer is 336
The reason is because you have to times 12 x 28
F inverse? then :
let's consider 3x + 9 as y.
so :
y = 3x + 9
y - 9 = 3x
x = y/3 - 3
now replace y with x and you get the inverse.
f^-1 (x) = x/3 - 3
9-7= 2 and ±2-±8=6 here are the answers to one of the questions you need help whith
3x+12=6 will give you x=2
And
-2=4-3x will give you x=-2
