100x+10x+y=9(10x+y) 化简

y+10x=x+y+9 10y+x=y+10x+27 X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y) 已知y/x=9/10则(1-y/x)[x/(y-x)]? (x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5 {6/x+y+10/x-y=30 6/x+y-10/x-y=-1 y+y+x=10,x+y+x=8,y=?,x=? 已知|x|+x+y=10 |y|+x-y=12 求 x+y=? {x-y=100 {12%x-10%y=100 x+10y+9=10x+y怎么解 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 已知/x/+x+y=10,/y/+x-y=12.求x+y的值 (x+y)(x+y-10)+25=0,且x-y=3,求x,y (x+y)(x+y-10)+25=0,且x-y=3,求x,y X+Y-8X+10Y+41=O,求X/Y-Y/X的值 x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 x+4y=9,x-4y=10 {10x+9y=493 x+y=52