Question

${x + y = 4 \\ 2x + y = 6$
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Answer 1

Resposta: OBS: esses { são um só, juntos

{ x + y = 6

{ 42x + y = 6

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{  x + y = 6

{ -42x - y= -6

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- 41x = 0

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x = 0

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0 + y = 6

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y = 6

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( x, y) = (0, 6)

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0 + 6 = 42 . 0 +  = 6

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6 = 6 = 6

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solução: ( x, y) = ( 0, 6)