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2x + y = 1 | dikali 1| = 2x +y = 1
dieliminasi maka tinggal
4y = -8
y = 1
maka 4y - y = 3y dan -8 -1 = -9
jadiii, 3y =9
y=9-3= 6
untuk cari x masukkan ke salah satu psamaan misal dimasukkan ke psamaan 2x +y =1
maka 2x + 6 = 1
2x=1-6
2x= -5
x= -5 -2 = -7
jadi x= -7 dan y = 6