Diketahui f(x) = 3x + 10. Jika f(a) = 4, nilai a adalah….

Mapel : Matematika
Kelas : VIII SMP
Bab : Fungsi Linear

Pembahasan :
f(x) = 3x + 10
f(a) = 3a + 10
4 = 3a + 10
3a = 4 - 10
3a = -6
a = -6/3
a = -2

F(x) = 3x + 10
F(a) = 4
Maka,
3a + 10 = 4
3a = - 6
a = - 2