Question

помогите! дам 10 баллов
решить систему
подробное решение ​

Answer 1

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Answer 2

$\left \{ {{(x-y)^2=9 \atop {x=11-y}} \right.$

$(11-y-y)^{2} = 9$

$(11-2y)^{2} = 9$

$11-2y = ±3$

$11-2y = -3$

$11-2y = 3$

$y = 4$

$y = 7$

$x = 11-4$

$x = 11-7$

$x = 7$

$x = 4$