Question

Solve x+y =1 and x-y = 4
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Answer 1

Answer:

x=y-1

y= - 4-x

It is used for graphical equations

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Answer 2

Answer:

$x + y + x - y = 1 + 4 \\ 2x = 5 \\ x = \binom{5}{2 } \\ x + y - x + y = 1 - 4 \\ 2y = - 3 \\ y = \binom{ - 3}{2}$

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