[1.2(1+5x)-0.8(1+2.5x)]×400000(1-x)-80000=208000
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
[1.2(1+5x)-0.8(1+2.5x)]×400000(1-x)-80000=208000
(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)
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
(x-1)/x -(1-x)/(x+1)=(5x-5)/(2x+2) x等于多少
[x(x+1)+x平方(x-1)]+(-3x)
6/(x+1)=(x+5)/[x(x+1)] (3-x)/(x-4)+1/(4-x)=1 2/(1+x)-3/(1-x)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
x(x^2-1)+2x^2 *(x+1)-3x*(2x-5)=x(3x^2-4x)-28
(2x-2)(x-1)=0 x(x-5)=5x-10