Question

решите систему линейных уравнений у=7х-15 у+1=-6х+12

Answer 1

$left { {{y=7x-15} atop {y+1=-6x+12}} right. \ left { {{y=7x-15} atop {7x-15+1=-6x+12}} right. \ left { {{y=7x-15} atop {13x=26}} right. \ left { {{x=2} atop {y=7*2-15}} right. \ left { {{y=-1} atop {x=2}} right. \ OTBET: (2;-1)$