Question

x+y=7 and x-y=5 solve simultaneous equation

Answer 1

Answer:

$x + y = 7 \\ \\ x = 7 - y \\ \\ put \: the \: value \: of \: x \: in \: second \: eq \\ \\ x - y = 5 \\ \\ 7 - y - y = 5 \\ \\ 7 - 2y = 5 \\ \\ 2y = 2 \\ \\ y = 1 \\ \\ x + y = 7 \\ \\ x + 1 = 7 \\ \\ x = 6$

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Answer 2

Answer:

Step-by-step explanation:

X+y=7

Therefore x=7-y

Substituting

7-y-y=5

Therefore/ -2y=5-7

-2y=-2

Therefore

Y=1