Question

Решить систему уровнений:
2•(x+y)=8
14-3•(x-y)=5y-x

Answer 1

{2*(x+y)=8
{14-3*(x-y)=5y-x

{2x+2y=8
{14-3x-3y=5y-x

{2x-2y=8
{-3x+3y-5y+x=-14

{2x-2y=8
{-2x-2y=-14
-4y=-6
y=1.5
2x-2(1.5)=8
2x-3=8
2x=11
x=5.5