5x=6y x比y=?
(2x+3y)除以(5x-3y)=3/5求x比y
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
x比y=1比3分之5,y比z=5比6,x+z等于27.
已知x²-5xy+6y²=0,则y比x等于
x+y=5; x^y+y^x=17
若3x=7y,则y比x= ,x:(x+y)=
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
已知3X=5Y,那么X比Y等于()比().
已知x+y除以5=y+z除以6=z+x除以7,且xyz≠0,求x比y比z
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=