5x-y=110 9y-x=110
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5x-y=110 9y-x=110
5x-y=110 9y-x=110
5x-y=110 9y-x=110
由5x-y=110得y=5x-110(1)把(1)代入9y-x=110中,得9(5x-110)-x=110
x=25,y=15
①+②*5,(5x-y)+(9y-x)*5=110+110*5,得到,44y=660,那么y=15,把y=15代入①,得x=25。
5x-y=110
9y-x=110 x=9y-110
5(9y-110)-y=110
x=15
y=25
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