f(2x-1 )= 5x-7, maka f(3) pliss butuh jawaban secepatnya :)

F(2x-1) = 5x-7

y = 2x -1
(y + 1) / 2 = x

f(y) = 5{(y+1)/2} - 7
= (5y + 5)/2 -7
= (5y + 5 - 14)/2
= (5y - 9)/2

f(3) = {5(3) - 9}/2
= (15 - 9) / 2
= 6 / 2
= 3

Semoga membantu :D