1/2x+3y=2/3 x-3/4y=-29/12求x和y
1/2x+3y=2/3 x-3/4y=-29/12求x和y
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y除以2x-y
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
2^x=4^(y-1) 27^y=3^(x+1)求x-y
已知3x-4y/2x+y=1/2 求x/y的值
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
已知方程4x+2y=12和2x+3y=16求x和y
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1