Answer:
(-3,-4)
Explanation:
x+y=-7
3x+2y=-17
x=-y-7
substitute
3(-y-7)+2y=-17
-3y-21+2y=-17
-y=4
y=-4
x=-3
Proof:
(-3)+(-4)=-7 true
3(-3)+2(-4)=-17
-9-8=-17 true
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