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3x-y=-8 |x1| 3x - y = -8
hasil = 7y = -7
Y = -1
disubstitusikan ke persamaan 1
x + 2y = -5
x + 2(-1) = -5
x =-5 +2
x = -3
3x - y = -8 (dikali 1)
3x + 6y = -15 (DIKURANGI)
3x - y = -8 -
7y = -7
y = -1
ambil salah satu persamaan
x + 2y = -5
x + 2.-1 = -5
x + (-2) = -5
x = -5 + 2
x = -3