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The solution for the equations x + y = 1...

The solution for the equations `x + y = 10 and x - y = 2` are :

A

`{:(x=6),(y=4):}`

B

`{:(x=4),(y=6):}`

C

`{:(x=7),(y=3):}`

D

`{:(x=8),(y=2):}`

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