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2x-y-3=0......(2)
dari pers (1)
x+4y-6=0
x=6-4y....(3)
subs pers(3) ke pers (1)
2x-y-3=0
2(6-4y)-y-3=0
12-8y-y-3=0
12-7y-3=0
-7y-3=0-12
-4y= -12
y= -12:(-4)
y= 3
subs y= 3 ke (3)
x=6-4y
=6-4(3)
=6-12
x=(-6) HP{ -6,3}