y+5x+1500y=8x

（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y这是什么

已知:3x-5y=0,求x/y,x-y/y,x-y/x已知:3x-5y=0,求x/y,x-y/y,x-y/x已知:3x-5y=0,求x/y,x-y/y,x-y/x3x-5y=03x=5y→x/y=5/

(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=?kuaihuajian(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=?kuaihuaji

x+y=5;x^y+y^x=17x+y=5;x^y+y^x=17x+y=5;x^y+y^x=17X=2,Y=3或X=3,Y=2x=3y=2或x=2y=3X=2Y=3X=2Y=3是容易得到的这个问题的难

3x-2y=9x-3y=2x+y=5x+2y=3y=x2x+y=83x-2y=9x-3y=2x+y=5x+2y=3y=x2x+y=83x-2y=9x-3y=2x+y=5x+2y=3y=x2x+y=8解

x+y=15x-2y=83x-y=72x-y=3x表示y和用y表示xx+y=15x-2y=83x-y=72x-y=3x表示y和用y表示xx+y=15x-2y=83x-y=72x-y=3x表示y和用y表

已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值可以得出x.x

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(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-y/x+y=3,求代数式5(x-y)/x+y

若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×

x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²

(X-Y)(X+Y)=5能解么(X-Y)(X+Y)=5能解么(X-Y)(X+Y)=5能解么不能解,任意给x值都能求出Y值

5x-4y(y-x)=?5x-4y(y-x)=?5x-4y(y-x)=?5x-4y(y-x)=5x-4y^2+4xy=5x-4y²+4xy5x-4y^2+4xy

(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解(2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解(2x+y)²+(x+3y)(x-3y

{x+y=1,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+

[2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^5-8(x-

化简x/y(x+y)-y/x(x+y)=化简x/y(x+y)-y/x(x+y)=化简x/y(x+y)-y/x(x+y)=x^2-y^2为分子,xy(x+y)为分母

8x+5y=1000,x=,y=8x+5y=1000,x=,y=8x+5y=1000,x=,y=y=200-8x/5取x=5,10,15,...,120得y=192,184,176,...8这一系列正

8x+5y=1000,x=,y=8x+5y=1000,x=,y=8x+5y=1000,x=,y=x=100,y=40或x=50,y=120无解..二元一次的要两个方程才有解

【x+y=5,2x+y=8【x+y=5,2x+y=8【x+y=5,2x+y=8把X+Y=5设为①,2x+y=8设为②②-①,得X=3.X=3代入①,得Y+3=5Y=2【X=3,Y=2

{x+y=52x-1y=8{x+y=52x-1y=8{x+y=52x-1y=8两式相加的得3x=13,x=13/3代入一式得y=2/3