Question

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pfvr me ajudem
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Answer 1

Resposta:

x = 6 e y = 3

Explicação passo a passo:

2x - y = 9

x + y = 9

3x = 18

x = 18:3

x = 6

x + y = 9

6 + y = 9

y = 9 - 6

y = 3