{x-y=100 {12%x-10%y=100

{x-y=100 {12%x-10%y=100 已知|x|+x+y=10 |y|+x-y=12 求 x+y=? 已知|x|+x+y=10,|y|+x-y=12,求x+y的值 已知|x|+x+y=10,x+|y|-y=12,求x、y的值 X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y) X,Y是有理数 X+|X|+Y=10 |Y|+X-Y=12 求X+Y=多少? 已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值? x y满足:x+/x/+y=10 /y/+x-y=12 求x+y的值 (/ /为绝对值) x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简 x / y(x+y) - y / x(x+y) = (x*x+y*y)(x*x+y*y)-(x*x+y*y)=12 求x*x+y*y等于多少 x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空 x.y都是自然数,且x(x-u)-y(y-x)+12,求x.y得值快1且x(x-y)-y(y-x)=12 [(y*y*y-y)/(xy+1)*(xy+1)-(x+y)*(x+y)]/[(x+y)*y/(x+1)]其中x=-11,y=1/12,化简再求值. x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=? x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=? 10X+Y+1/3Z=10Y+X 10X+Y+2/3Z=100X+Y y=x(x