x/3+y/5+(3.3-x-y)/5=51/60y/3+x/5+(3.3-x-y)/5=53.4/60
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x/3+y/5+(3.3-x-y)/5=51/60y/3+x/5+(3.3-x-y)/5=53.4/60
y=5;x=14;y=((x=3*y,x+6),x-1); printf(''x=%d,y=%d'y=5;x=14;y=((x=3*y,x+6),x-1);printf(''x=%d,y=%d'',x,y);
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
3x(2x+y)-2x(x-y),其中x=1,y=1/5
已知-x+2y=5则5(x-2y)-3(x-2y)-60
先化简,再求值:【(X+2Y)(X-2Y)-(X+4Y)平方]除4Y,其中X=5,Y=2
先化简,再求值:【(X+2Y)(X-2Y)-(X+4Y)平方]除4Y,其中X=5,Y=2
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
(x+y)^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 ..
解下列方程组:(1)3x+4y=22x-y=5(2)4分之x-y=-1x=3y(3)3(x+y)-4(x-y)=42分之x+y+6分之x-y=1要过程,
5X+8Y=56 4Y=X 求X.Y各多少
X+Y=5 X×Y=-10 X和Y等于多少?
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
1.(-2a)³·b²÷(8a³b²) 2.-5x(2x²-3x+4)+4x³+15x3.(x²-2y²)(x+2y)-2xy(x-y)4.(x-y+z)(x-y-z)化简求值 [(x+y)(x-y)-(x+y)²-2y(x-2y)]÷(-2y),其中x=5,y=2003
已知2x+5y=3,用含x的代数式表示y,则y=()
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
化简2x-(5x-3y)+(7x-y)