Question

find solution of pair of linear equations x+y=-1,y-x=9​

Answer 1

Step-by-step explanation:

x+y=-1

-x+y=9

__________

+. -. -

-----------------

2x=-10

x=-5

y=4

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Answer 2

X + Y = -1. ---------- 1)

- X + Y = 9. ------------- 2)

:. add 1) and 2)

2Y = 8

:. Y = 4

:. X = -5