Question

Даны уравнения двух прямых: -2x-7y+1=0 и 3x+4y+5=0

Answer 1

$left { {{-2x-7y+1=0} atop {3x+4y+5=0}} right. ; left { {{2x+7y=1|cdot (-3)} atop {3x+4y=-5|cdot 2}} right. ; left { {{2x+7y=1} atop {-13y=-13}} right. ; left { {{2x+7cdot 1=1} atop {y=1}} right. ; left { {{x=-3} atop {y=1}} right.$

$x_0+y_0=-3+1=-2$