tolong dong please.. .

Catatan :
A + B = C

A1 + B1 = C1
p+ 1 + 2p = 4
3p = 3
p = 1


A2 + B2 = C2
2q + q = 12
3q = 12
q = 4

A3 + B3 = C3
-3r + r+2 = -2
-2r = -4
r = 2


A4 + B4 = C4
2s + 1+ 2 - s = 9
s + 3 = 9
s = 6