Question

Solve x and y 2x+y=1and x+y=8​

Answer 1

Answer:

$2x + y = 1 \: \: \: \: \: ......1 \\ x + y = 8 \: \: \: \: .......2 \\ subtract \: 1 \: and \: 2 \\ 2x + y - (x + y) = 1 - 8 \\ 2x + y - x - y = - 7 \\ x = - 7$

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