Question

Qual a resposta de x+y=6 2x+y=4

Answer 1

{ x + y = 6

{ 2x + y = 4

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x = 6 - y

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2(6 - y) + y = 4

12 - 2y + y = 4

-1y = 4 - 12

-1y = -8

-y = -8

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$\Large\boxed{y = 8}$

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2x + 8 = 4

2x = 4 - 8

2x = -4

x = $\frac{-4}{2}$

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$\Large\boxed{x = -2}$

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-2 + 8 = 6

2(-2) + 8 = 4