已知x:y=3:5,求2y/5x的值 (比例)
已知3x-2y/x+y=5/3求x;y的值
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
已知|x-3|+(y-x-5)2=0,求x、y的值.
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值
已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值
已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值
已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值.
已知X/Y=5/3,求X/(X+Y)+X/(X-Y)-Y*2/(X*2-Y*2)的值.
已知5|2x-3y+1|+(5x-2y-3)=0,求x,y的值
已知2X+3Y=0,求(5X+4Y)/(3X-2Y)的值
已知(x-2y)^2+|3x-1-2y|=0,求x+5y的值