Diketahui f(x) = px + q Jika f(-3) = 12, dan f(4) = 26, nilai p+2q

Kelas 8 Matematika
Bab Fungsi 

f(x) = px + q

f(-3) = -3p + q = 12
f(4) = 4p + q = 26

4p + q = 26
-3p + q = 12
----------------- -
7p = 14
p = 2

4p + q = 26
4 . 2 + q = 26
q = 26 - 8
q = 18

p + 2q
= 2 + 2 . 18
= 2 + 36
= 38