x－2／9x-1/14＝0

x+2/x+3－x+1/x+2=x+8/x+9－x+7/x+8 方程x+1x+2+x+8x+9＝x+2x+3+x+7x+8 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 2x－3＝5x－27+9x(方程) 3.2x+6.8＝13.2(方程) 5x+24-2x＝14x+ 已知x－3x＋1＝0,计算2x-3x-7x＋2009 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 解方程 x(x+1)(x²-2x-4)=0 x³-2x+1=0 x的4次方+8x³+14x x(2x－1)＝-3x(x+1)+5x²+3 1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...1/(x+9)(x+10)=0 解方程(3x^2+9x+7)/(x+1)-(2x^2+4x-3)/(x-1)-(x^3+x+1)/(x^2-1)=0 3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5 解方程 x(x+1)-x-9=0 x²-2x=224 x(x-2)=2(2-x) x²-(2(√2)