(7.12*5+8.4x)/(5+x)=7.6
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
3/x-1=4/x 6/x+1=x+5/x(x+1)
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
(x-1)/x -(1-x)/(x+1)=(5x-5)/(2x+2) x等于多少
(先化简后求值)(3x/x+2-x/x-2)+2x/x^2-4,x=4-根号5,
4×2.6-5x=8.4 17.28-4x=5.6x 2(4x-3.5)=11 4.3x-x+1.5x=9.6 4到解方
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
6/(x+1)=(x+5)/[x(x+1)] (3-x)/(x-4)+1/(4-x)=1 2/(1+x)-3/(1-x)
(2x-2)(x-1)=0 x(x-5)=5x-10