x-5y=0 3x+7y=44
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(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
{2x+y/3-2y=0 2(2x+y)-5=7y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
7y(x-3y)-2(3y-x)=0 .x=?,y=?
已知7x+5y/2y-x=3/2,且x≠0,求X/x-4y
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
已知(3x+1)(3x-3)-3x+2)^2=-7,(y+7)(y-7)-y(y-7)=0,求8y^2-5y(-y+3x)+4y(-4y-5/2x)的值
y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3.5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3先化简,再求值;
先化简,再求值:[3x-2/x+y(x+y/3x-x-y)]/(x-y/x),其中5x+3y=0
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
3x+5y-(x+y)=6 2(x+y)-3x=-7
2y-x/7x+5y=2/3 且y不等于0 则x/y的值为?
已知2x-y/7x+5y=2/3且y≠0,求x/y的值
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x
(x-y)的4次方/(y-x)的3次方+(x-y)0的次方*(y-x)+(-x-y)7次方/(x+y)6次方=