求满足2X^3-3X^2+(2-Y)X+Y-7=0的正整数X,Y的值
正整数x,y满足x2-y2=2xy,求x-y/x+y的值
已知x、y是正整数,且满足3x+2y=17.试求x、y的值.
已知:x,y满足|2x-y|+|y-1/2|=0,求7x-3y的值.
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+
已知正整数x,y满足2∧x 49=y,求x,y值
求满足下列条件的所有正整数解3x+2y-z=4,2x-y+2z=6,x+y+z<7
已知有理数x,y,z满足|x-z-2|+|3x-6y-7|+(3y+3z-40)^2=0,求x,y,z的值
已知X、Y满足2X-7Y=3M,X+2Y=4m+5,且X+Y=0,求M的值
已知x和y是正整数,并且满足条件xy+x+y=71,x^2y +xy^2=880,求x^2+y^2的值
已知x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,求x:y:z的值
已知x,y满足x^2+y^2-6x+8y+25=0,求y^x的值