解方程组 1.(x-1)(x-2)等于xy 2.x(x+2)-4y(y-1)等于(x+2y)(x-2y)
解方程组 1.(x-1)(x-2)等于xy 2.x(x+2)-4y(y-1)等于(x+2y)(x-2y)
4分之3x+2y等于5分之2x+y等于6分之x-y+1.解方程组
解方程组:(x-1)(y-2)=xy和x(x+2)-4y(y-1)=(x+2y)(x-2y)
解方程组{(x-1)(y-2)=xy {x(x+2)-4y(y-1)=(x-2y)(x+2y)
解方程组:(x-1)(y-2)=xy,x(x+2)-4y(y-1)=(x+2y)(x-2y)
(x+y)(x-y)-(x的2次方-3xy),其中x等于2,y等于-2分之1
解方程组:3x等于5y 2x-3y等于1,
实数X,Y满足X大于等于Y大于等于1和2X平方-xy-5x+y+4=o,则x+y的值
已知x分之1减y分之1等于4,求x+7xy-y分之x-2xy-y
若1/x+1/y=3,4y-2xy-4x/3x+xy-3x等于多少
4x+2xy+y等于
1/2X-1/X+Y*(X+Y/2X-X-Y)等于多少,