5x-y=110 9y-x=110

5x-y=110 9y-x=110 ｛x-y=4 ｛5x-y=110 4x-y=－1 9y-x=110 x=5,y=110{x=y/x; y=y-x;}while(y>=1); 求x y 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 很多很多数学题都是求x,y的1.2x-y=5 3x+4y=22.5x-y=110 9y-x=1103.8x+3y=7 5x-3y=6 4x+3y=6x-y=-25.4x-5y=1 2x-y=56.4x+3y=6 5x+6y=3 （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x 5x-y=110和9y-x=110,求x、y各等于多少 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 解方程组：一.5x-y=110 9y-x=110 二.5x-2y=-20 3x-5y=-31 x+y=5; x^y+y^x=17 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝ 化简 x / y(x+y) - y / x(x+y) = 解方程组5x-y=110和9x-x=110,用代入法,5x-y=110和9y-x=110， (X-Y)(X+Y)=5 能解么 5x-4y(y-x)=? 5x=3y,(2x+y)的平方=5x(x+y)+9