Question

1 и 2. заранее спасибо

Answer 1

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Answer 2

Спосибо

Answer 3

1) $left { {{ 10x - y = -2}atop {x= -y + 13}} right.$
$left { {{ 10 ( -y + 13) - y = -2}atop {x= -y + 13}} right.$
$left { {{ -10y + 130 - y = -2}atop {x= -y + 13}} right.$
$left { {{ -11y = - 132}atop {x= -y + 13}} right.$
$left { {{ y = 12}atop {x= 1}} right.$,
T.o $y_{0} - x_{0} = 12 - 1 = 11$
Ответ : 11
2) $left { {{ -7x - y = 8} atop {x= -y + 40}} right.$
$left { {{ -7(-y + 40) - y = 8} atop {x= -y + 40}} right.$
$left { {{ 7y - 280 - y = 8} atop {x= -y + 40}} right.$
$left { {{ 6y = 288} atop {x= -y + 40}} right.$
$left { {{y= 48} atop {x= -8}} right.$,
T.o $2x_{0} + y_{0} = 2 * (-8) + 48 = 32$
Ответ: 32