{2x-5y=-1
{3x+2y=8
{8/3-2/3y
2(8/3-2/3y)-5y=-1
y=1
x=8/3-2/3×1
x=2
(x, y) =(2, 1)
{2×2-5×1=-1
{3×2+2×1=8
{-1=-1
{8=8
(x, y)=(2, 1)
{2x-5y=-1
{3x+2y=8
{2x-5y=-1
{8/3-2/3y
2(8/3-2/3y)-5y=-1
y=1
x=8/3-2/3×1
x=2
(x, y) =(2, 1)
{2×2-5×1=-1
{3×2+2×1=8
{-1=-1
{8=8
(x, y)=(2, 1)