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x+2y=2......(1)
2x+(-4)=0
2x=4
x=2....(2)
substitusi persamaan (2) ke persamaan (1)
x+2y=2
2+2y=2
2y=2-2
2y=0
y=0
pembuktian
misal persamaan (2)
x+2y=2
2+2(0)=2
2=2 (benar)
hp:{(2,0)}