Question

× + y =9
× - y =5 me ajudem pfvr??

Answer 1

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Ola evelyn

x + y = 9
x - y = 5  (adição)

2x = 14
x = 7

7 + y = 9
y = 2

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Answer 2

Isole os Xs de ambas as expressões: x = 9 - y / x = 5 + y 
x =x => 9 - y = 5 + y => y + y = 9 - 5 => 2y = 4 => y = 4/2 = /// y = 2 ///