解方程组 1（2x-3y=-1 y=2x-1 ） 2（2x+5y=12 2x+3y=6 ）3（3x-2y=6 2x+3y=17）4（5x+2y=7 2x+y=1）

二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 解方程组,(x+y)^2-3(x+y)=0和x-y=1 利用图像解方程组解方程组2x-y=1,x+2y=3 解方程组：解方程组：｜X+Y｜=1｜X｜+2｜Y｜=3 解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5) 2x+2y-x+y=3;x+y-2x+2y=1 方程组的解 解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12) 数学书解方程组{2(x+y)-(x-y)=3,（x+y)-2(x-y)=1 解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 解方程组 3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1 解方程组:{3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1} 2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组 解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解二元一次方程组3(x+y)-4(x-y)=4 x+y/2+x-y/6=1 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk 解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1