diketahui f(x) =ax+12,jika f(-2)=6,maka nilai a adalah

f(x) = ax + 12
f(-2) = - 2a + 12
6 = - 2a + 12
6 - 12 = - 2a
- 6 = - 2a
a = 3

Kelas 8 Matematika
Bab 2 - Fungsi

f(x) = ax + 12
f(-2) = -2a + 12 = 6

-2a + 12 = 6
-2a = 6 - 12
-2a = -6
a = -6/-2
a = 3