system equations algebraically x-y=6 and x+3 y= -6 what are y and x coordinate for 3 and 6

x - y = 6---------(i)

x + 3y = -6 --------(ii)

subtracting equation i from ii

-4y = 12

y = -3

x - (-3) = 6

x+3=6

x = 3

answer in bold.

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