{2x+3y=82.8
{x+2y=56.9
{x=56.9-2y
{ 113.8-y=82.8
{y=113.8-82.8
{y=31
{x= -5.1
2x+3y=82.8
x+2y=56.9
y=-x/2+28.45
2x+3*(-x/2+28.45)=82.8
2x-1.5x+85.35-82.8=0
0.5x+2.55=0
x=-2.55/0.5
x=-5.1
-5.1+2y=56.9
y=62/2
y=31
{2x+3y=82.8
{x+2y=56.9
{x=56.9-2y
{ 113.8-y=82.8
{y=113.8-82.8
{y=31
{x= -5.1
2x+3y=82.8
x+2y=56.9
x+2y=56.9
y=-x/2+28.45
2x+3y=82.8
2x+3*(-x/2+28.45)=82.8
2x-1.5x+85.35-82.8=0
0.5x+2.55=0
x=-2.55/0.5
x=-5.1
x+2y=56.9
-5.1+2y=56.9
y=62/2
y=31