Question

{4x+4y=28; {-2x-5y=-22

Answer 1

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Ola Stephanie 

4x + 4y = 28
-2x - 5y = -22

x + y = 7
-2x - 5y = -22
2x + 2y = 14

-3y = -8 
y = 8/3

x = 7 - y
x = 21/3 - 8/3 = 13/3 

pronto