open the parenthes. and then after that you'll get 27+12x-15. if you simplify that then you'll get 12x+12
F(x) = 4x + 8
Find x in terms of f(x):-
4x = f(x) - 8
x = (f(x) - 8 ) / 4
replace x by h(x) and f(x) by x
h(x) = (x - 8 ) /4
I cant get any of the choices
