方程组3x+2y=1 7x-4y=-15

方程组3x+2y=1 7x-4y=-15 5x=3y x-y=4 写出方程组的过程 1/2X=-2/3y 2x+y=7 写出方程组过程 解方程组解方程组｛y=2x-7｛x+y+z=1｛3x-z=4 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 已知方程组{2x+y=6,x-3y=1,不解方程组,求7y(x-3y)²-(3y-x)²的值.已知方程组{2x+y=6,{x-3y=1.不解方程组,求7y(x-3y)²-(3y-x)²的值.已知方程组{2x+y=6，{x-3y=1.不解方程组，求7y(x-3y)²-(3y-x)³ 2(x+y)-3(x-y)+=3 4(x+y)+3x=15+3y 换元法解方程组 解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3（x-y）=15 10/x+y+3/x-y=-5 15/x+y-2/x-y=-1（用换元法解此方程组） 3/(X-Y)+10/(X+Y)=-5 2/(X-Y)-15/(X+Y)=1 解分式方程组 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 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 解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1 一道二元一次方程组!3(x+y)-4(x-y)=4,(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