Решение во вложениях...
x+2y=115x-3y=3
x+2y=11
y=-x/2+5.5
5x-3y=3
5x-3*(-x/2+5.5)=3
5x+1.5x-16.5-3=0
6.5x-19.5=0
x=19.5/6.5
x=3
3+2y=11
-8+2y=0
y=8/2
y=4
Решение во вложениях...
x+2y=11
5x-3y=3
x+2y=11
y=-x/2+5.5
5x-3y=3
5x-3*(-x/2+5.5)=3
5x+1.5x-16.5-3=0
6.5x-19.5=0
x=19.5/6.5
x=3
x+2y=11
3+2y=11
-8+2y=0
y=8/2
y=4