解方程组共三题1:{3(y-2)=x+1,2(x-1)=5y-8.2:{4x-5y-17=0,6x-25y-23=0.3

解方程组共三题1:{3(y-2)=x+1,2(x-1)=5y-8.2:{4x-5y-17=0,6x-25y-23=0.3 解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5) 换元法解方程组3/x+y+2/x-y=17/5 2/x+y-5/x-y=1 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 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=1 解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1 解二元一次方程组：3(x+y)-4(x-y)=4,x+y/2+x-y/6+1 1/2x-2y=-74,x-6y=-12解方程组,x／5-y／2=2,2x+3y=4解方程组 解方程组：（0.2x+0.1y）/2- （4x-y）/10=（x-y）/5+ (3x+0.5y)/30 (3x+2y-1 解方程组x/4+Y/4=2,x/6+y/3=2; X+2Y=1,2X-3Y=2; 4X-3Y=17,5X+Y=7 解方程组一{2x-5y=1,5x+2y=17 二{x+y/2=6-x-y/3,4(x+y)-5(x-y)=2