{x+2y=10 {x+1/3=2y+2/5-1 解方程,{x+2y=10{x+1/3=2y+2/5-1

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{x+2y=10 {x+1/3=2y+2/5-1 解方程,{x+2y=10{x+1/3=2y+2/5-1
{x+2y=10 {x+1/3=2y+2/5-1 解方程,
{x+2y=10
{x+1/3=2y+2/5-1

{x+2y=10 {x+1/3=2y+2/5-1 解方程,{x+2y=10{x+1/3=2y+2/5-1
+2/5-1=-3/5
x+1/3=2y-3/5
x=2y-3/5-1/3
x=2y-14/15
4y-14/15=10
4y=10+14/15
y=41/15
x=150/15-82/15
x=67/15