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lawyer [7]
3 years ago
9

X-y=3 X+2y=-6 Solve using substitution

Mathematics
1 answer:
Tresset [83]3 years ago
3 0
X-y=3=>x=3+y
X+2y=-6
=========
3+y+2y=-6
3+3y=-6
3y=-6-3
3y=-9
y=-3

X+2y=-6
X+2(-3)=-6
X-6=-6
X=0
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