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Scoobie
Mathematics
5 August, 06:29
What is X+y=-1
X-y=7
+2
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Scott Hampton
5 August, 06:35
0
Step-by-step explanation:
X+y=-1
X-y=7
Ys are additive inverse's.
X+x+y-y=7-1
2x=6
X=3
Plug x=3 into x+y=-1
3+y=-1
-3 both sides
Y=-4
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