Hi

Solving using elimination of the y variable

x+2y =4 

x-2y=-8

2x = -4

x = -1

Solving for y

x+2y =4 

-1 + 2y = 4

2y = 5

y = 5/2

CHECKING our Anwer

-1 + 2*(5/2) = -1 + 5 = 4 

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