12+21=33=11X(1+2) 23+32=55=11x(2+3) 59+95=154=11x(5+9)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程1、 (x-1)(x-2)分之2x-1=(x-2)(x-3)分之x-5 (2)2x平方-11x-21分之x=x平方
(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)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程⑴ x/(2x^2-11x-21)=(x+7)/(x^2-12x+35)
计算:1/(x^2-7x+10)+1/(x^2-x-2)+1/(x^2+5x+4)+1/(x^2+11x+28)=( )
5x+3=x-4,4y+11=22,11x+68-2x=100-9x,0.1x/0.2-(0.27x+0.18)/0.0
(3x-5)X2=3X(x-1)+11 5X(3x+2)-1=5x+199 (10x+5)X5分之2=3X(x-1)+9
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?