(1)2p+3q=16danp-q=-12 (2)y+2x=0dan4x+y=3

1)

2p + 3q = 16
2p - 2q = -24 (sudah dikali 2)
___________-
5q = 40
q = 8

p - q = -12
p - 8 = -12
p = -4

2)

4x+y = 3
2x + y = 0
________-
2x = 3
x = 3/2

y + 2x = 0
y = -2x
y = -2(3/2)
y = -3