{3x-2y=3,2x+2y=17 {4x-2y=14,5x+y=7 {x+3y=6,2x-3y=3 {2x+3y=11,y-2x=1 {2a-3b=2,5a-2b=5 {2(m-1)=3(n+2),2(n+3)=3(1-m) {y-x/7
问题描述：
{3x-2y=3,2x+2y=17 {4x-2y=14,5x+y=7 {x+3y=6,2x-3y=3 {2x+3y=11,y-2x=1 {2a-3b=2,5a-2b=5 {2(m-1)=3(n+2),2(n+3)=3(1-m) {y-x/7-x+y/6=1/2,5(x+y)-2(x+y)=-1 {x+y=8,5x-2(x+y)=-1
答
1、3x-2y=32x+2y=176x-4y=66x+6y=5110y=45y=4.5x=42方程无解3、x+3y=62x-3y=32x+6y=122x-3y=3y=1x=34、2x+3y=11y-2x=13y+2x=113y-6x=18x=10x=1.25y=17/65、2a-3b=25a-2b=510a-15b=1010a-4b=10b=0a=16、2(m-1)=3(n+2)...