Question

x + y = 2x + 3y =11
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Answer 1

{x + y = 2. ==> y=2 -x

{x + 3y =11

x + 3(2-x)=11

x +6-3x=11

-2x = 5

x = -2,5. ==> y=2 -(-2,5)= 4,5