Verified answer

seja w = 2x + 3

2x = w - 3

x = (w - 3)/2

f((w - 3)/2) = 3*(w - 3)/2 + 2 = (3w - 9 + 4)/2 = (3w - 5)/2

f(x) = (3x - 5)/2

f(3x + 2) = (3*(3x + 2) - 5)/2 = (9x + 6 - 5)/2 = (9x + 1)/2

pronto