(0.3-30x)\0.3-3(5-2x)\0.05=1

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/06 08:25:45

$(0.3-30x)\0.3-3(5-2x)\0.05=1$

两边同乘以0.3
0.3-30x-18(5-2x)=0.3
0.3-30x-90+36x=0.3
36x-30x=90-0.3+0.3
6x=90
x=90÷6
x=15

x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 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/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 1、0.3X-0.4X=0.5 2、5X-2.5X+3.5X=-18 3、X-2/5X=-3+6 (2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1 y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), (3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1 解方程(x+1/x+2)-(x+2/x+3)=(x+5/x+6)-(x+6/x+7) 解方程：x+2/x+1-x+3/x+2=x+6/x+5-x+7/x+6