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3x+5y=0 x1 =3x +5y =0 -
-3y =5
y=5/3
x+2y=-5
x=-5-2y ---> subtitusikan
3x+5y=-4
3(-5-2y)+5y=-4
-15-6y+5y=-4
-y=-4+15
-y=11
y=-11 ----->subtitusikan nilai y
x+2y=-5
x+2(-11)=-5
x-22=-5
x=-5+22
x=17
Jadi x =17 dan y=-11