Question

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

Answer 1

Answer:

x + y = 7

x - y = -5

2x = 2

x = 1

y = 7 - x

y = 7 - 1

y = 6

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Answer 2

Answer:

$x - y + 5 \\ x - y = - 5 \\ \\ x + y = 7 \\ x - y = - 5 \\ - - - - - - - \\ 2x = 2 \\ x = \frac{2}{2} \\ x = \underline{ \underline{ 1}} \\ \\ x - y = - 5 \\ 1 - y = - 5 \\ 1 + 5 = y \\ \underline{ \underline{6}} = y$