0.3-30x/0.3-6.5=3(5-2x)/0.05-11/2
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
160乘25%-1.3x=17.9 x/5-x/6=0.4 3(x+2)=40+11 0.3/0.5=x+1/2x-1
关于一元一次方程的(1)0.6x+0.3=0.9x-0.2 (2)3(x-1)-7(x+5)=30(x+1)(3)(2x
解方程x(2x-3)+3x+3x(x-2)=5x(x-4)+11
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
2x+3x+4x+5x+x+6x+7x=100
1、0.3X-0.4X=0.5 2、5X-2.5X+3.5X=-18 3、X-2/5X=-3+6
3x-2(4x+8)=2.4 6.5-(x+1.3)=2.2 0.2(x-4)=0.3(x-1