(100-x)/(80+x)=7:
(X/80+X/100 +5)*40=X,
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
(X+X)+(X-X)+(X*X)+(X/X)=100
初一数学x*x+2x+5的值为7,请求3x*x+6x+3的值.因为x*x+2x2x+3=3x(x*x+2x)+2x+2x
有一道题目"x=100时,求多项式(8-7x-6x平方+x立方)+(x立方+5x平方+4x-1)-(-x平方-3x+2x
5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x+4)
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
2x²+7x+1=0 x(x-1)=3x+7
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
2x+3x+4x+5x+x+6x+7x=100
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)