3x+1=4y-x=y+2怎么解?
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
怎么解二元一次方程组2(x-y)/3-x+y/4=-1和6(x+y)-4(2x-y)=16
x-y=2y 0.2x+3y=1 这个二元一次方程怎么解?
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
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
2x-y=-3(1) 3x+4y=10(2)怎么解
2x-y=3(1) 3x+4y=10(2)怎么解
二元一次方程 x/3-y/4=1 x/2-y/3=2 怎么解