Diketahui f(x) = 3x-2. Jika f(a) = 16 dan f(-2) =b , maka nilai a + b adalah..

f(x) = 3x - 2

f(a) = 16
16 = 3a - 2
16 + 2 = 3a
18 = 3a
a = 6

f(-2) = b
b = 3(-2) - 2
b = -6 -2
b = -8

a + b
6 - 8 = -2

f(x) = 3x - 2

f(a) = 3. a - 2
f(a) = 3a - 2
3a - 2 = 16
3a = 16 + 2
3a = 18
a = 18 / 3
a = 6

f(-2) = 3(-2) -2
f(-2) = -6 - 2
f(-2) = -8
b = -8

Jadi, nilai a + b??
→ a + b = 6 + (-8) → -2 (Jawaban)