## College Algebra 7th Edition

g(f(x)) = g(3x + 4) =$\frac{3x + 4 - 4}{3}$ = x f(g(x)) = f($\frac{x - 4}{3}$) = 3($\frac{x - 4}{3}$) + 4 = x - 4 + 4 = x Since g(f(x)) = f(g(x))