│x-2│=3 求x │x-2│+│y+3│=0 求x和y
│x-2│=3 求x │x-2│+│y+3│=0 求x和y
已知x和y满足x+3y+|3x-y|=19,2x+y=6,求x,y的值
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
已知(3X-2Y+1)的平方+│4X-3Y-3│=0,求X,Y
(2x-y+7)²+│4x+3y-1│=0 求x的y次方
y=0.5x(x+2)(3x-1) 求x轴交点.
1.已知集合A={(X,Y)│2X-Y=0},B={(X,Y)│3X+Y=0},C={(X,Y)│2X-Y=3},求A∩
已知实数x,y满足关系式│x+y-3│+根号(xy-6)=0,求代数式(x+2y)/y-x的值
4X-3y=15.3X+2y=7.求X与y
已知x:y=2:3,且二分之2x+y-1,求x、y的值
设全集U={(x,y)│x,y∈R},集合M={(x,y)│y-3/x-2=1},N={(x,y)│y≠x+1},求Cu
已知有理数X,Y满足1/2│X-Y│+┃Y-1/2┃=0,求3X-7Y的值.