{2х+у=3
{-3х+4у=-10
{y=3-2x
{-3x+4y=-10
-3x+4(3-2x)=-10
-3x+12-8x=-10
-3x-8x=-10-12
-11x=-22
x=2
y=3-2×2
y=-1
(x;y)=(2;-1)
{2х+у=3
{-3х+4у=-10
{y=3-2x
{-3x+4y=-10
-3x+4(3-2x)=-10
-3x+12-8x=-10
-3x-8x=-10-12
-11x=-22
x=2
y=3-2×2
y=-1
(x;y)=(2;-1)