Question

$x+y=38\\x-y=12$

Answer 1

Resposta:

• x= 25 e y= 13

Explicação passo-a-passo:

• x+y=38
• x-y=12

____________________

• x+x=38+12

• 2x=50

• x=50/2

• x=25

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• y=38-x

• y=38-25

• y=13