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sertanlavr [38]
4 years ago
11

What is X+y=-1 X-y=7

Mathematics
1 answer:
Shtirlitz [24]4 years ago
3 0

Answer:

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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