用代入法解下列方程组{x-y-6,2x+3y-8 {3（y-2）=x-17,2（x-1）-5y-8

用代入法解下列方程组{x-y-6,2x+3y-8 {3（y-2）=x-17,2（x-1）-5y-8
用代入法解下列方程组{x-y-6,2x+3y-8 {3（y-2）=x-17,2（x-1）-5y-8

用代入法解下列方程组{x-y-6,2x+3y-8 {3（y-2）=x-17,2（x-1）-5y-8
{x-y-6=0 (1)
,2x+3y-8=0 (2)
x-y-6=0
x=y+6
2(y+6)+3y-8=0
2y+12+3y-8=0
5y=-4
y=-4/5
x=26/5
{3（y-2）=x-17,
2（x-1）-5y-8=0
3（y-2）=x-17
3y-6=x-17
x=3y+11
2（3y+11-1）-5y-8=0
6y+20-5y-8=0
y=-12
x=-25