tolong di jawab ya besok mau di kumpul

1.
F(x) = -5x+6
f(x-2) = -5(x-2) + 6
f(x-2) = -5x+10+6
f(x-2) = -5x+16
2.
F(y) = 3y-5
-14= 3y-5
-9 = 3y
y = - 3