substitusi dari x+3y=-11 dan 2x-y=13

x = 4 dan y = -5

x+3y=-11 ( dikali 2)
2x-y = 13
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2x + 6y = -22
2x - y = 13 -
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7y = -35
y = -5

x - 3y = - 11
x - 3(-5) = - 11
x = -11 + 15
x = 4

x+3y=-11~ x=3y - 11(pers 1)
2x-y=13 (pers 2)
Subtitusikan persen ke pers 2
2 (3y-11)-y=13
6y-22-y=13
5y=13+22
5y=35
y=35/5
y=7
Subtitusikan y=7 ke pers 1
x=3 (7)-11
x=21-11
x=10