x/3+y/5+(3.3-x-y)/5=51/60
y=5;x=14;y=((x=3*y,x+6),x-1); printf(''x=%d,y=%d'
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
先化简,再求值:【(X+2Y)(X-2Y)-(X+4Y)平方]除4Y,其中X=5,Y=2
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
已知2x+5y=3,用含x的代数式表示y,则y=()
根号X(根号X-根号Y)=3根号Y(5根号Y-根号X),求(2X-根号XY+3Y)/X+根号XY-6Y
x:y:z=7:5:3且x+y=24,求x y z值
X,Y的值是X+3Y=5,X≡2,Y等于多少?
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
(y-x)(x-y)^3(y-x)^5怎么算
数学(x-y)^5*(y-x)^3*(x-y)^2
已知x,y为实数,且2(x+2y)=x²+y²+5求代数式3x-4y分之x²+y²