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2(-2y+5+0)+y-2=0
-4y+10+0+y-2=0
-4y+10+y-2=0
-4y+y=0-10-2
-3y=-12
3y=12
y=4
x+2y-5=0
x=-2y+5+0
x=-2.4+5+0
x=-8+5+0
x=-3
Himpunan penyelesaiannya adalah {(-3,4)}