Question

x + y = 10
x - y = 12​

Answer 1

Answer:

See this.

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

X+Y=10. (1)

X-Y=12. (2)

Adding (1) and(2) :

X+Y=10

+ X-Y=12

2X=22

X=11

Put x=11 in (1)

11+Y=10

Y=-1

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