Answer to Question #2607 in Algebra for serena

Question #2607

Solve the equation x+y=4 if the domain is {(-4,-2,0,2,4)}

Expert's answer

We have to find pairs among numbers {-4,-2,0,2,4} whose sum is equal to 4. These are the following ones:
(0,4),
(4,0)
(2,2)

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