Question

Найти значения выражения х+у, если
-2х - 3у = -12
4х + у = 14

Answer 1

$boxed{mathtt{ left { {{-2x-3y=-12} atop {4x+y=14}} right. }}\boxed{mathtt{ left { {{-2x-3(14-4x)=-12} atop {y=14-4x}} right. }}\boxed{mathtt{ left { {{-2x-42+12x=-12} atop {y=14-4x}} right. }}\boxed{mathtt{ left { {{10x=30} atop {y=14-4x}} right. }}\boxed{mathtt{ left { {{x=3} atop {y=2}} right. }}\mathbf{x+y=2+3=5}$