Jika fungsi f(x) = 5 - 2x A) Tentukan nilai x = -7 B) jika F(b) = 17, tentukan nilai B

f(x) = 5 -2x

a) x = -7
    f(x) = 5 -2x
    f(-7) = 5-2(-7)
            = 5 + 14
            = 19

b) f(x) = 5-2x
    f(b) = 5 -2b
    17 - 5 = -2b
     12 / -2 = b
     -6 = b

A , f(x) = 5 - 2x
=> f(-7)= 5 - 2(-7)
= 5 + 14
= 19

B, f(b) = 5 - 2b = 17
-2b = 17 - 5
-2b = 12
b = -6