神马作文网方程8(50-X)-5X=101
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/19 12:51:19
,再答：-2x=-6再答：x=3再答：请采纳
x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1
解当x≥0时,原式化为5x-x=84x=8x=2当x＜0时,原式化为5x-（-x）=86x=8x=4/3（舍去）方程的解为x=2
(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=(x/2)*(2/x(x+2))+(2/(x+2)(x+4))+.+2/(x+8)(x+10)=(x/2)*[1/x
5x/(x²+x-6)+(2x-5)/(x²-x-12)=(7x-10)/(x²-6x+8)5x/(x-2)(x+3)+(2x-5)/(x+3)(x-4)=(7x-10)
8x+2-50=5x移项8x-5x=50-23x=48x=16
当X>=0时原方程变为 5X-X=8 即4X=8 X=2 满足 2 当X<0是5X+X=8&
(1/5x+1/10x)/(x-1/5x)=3/81/5x+1/10x=3/8*(x-1/5x)2+1=6/8(x-1)(全式乘10x)24=6x-6x=5
(5-2x)/(x^2-x-12)=5x/(x^2+x-6)+(10-7x)/(x^2-6x+8)(5-2x)/(x-4)(x+3)=5x/(x+3)(x-2)+(10-7x)/(x-2)(x-4)分
5x-3x=8+102x=18x-9
(1)(X+7)/(X+6)+(X+9)/(X+8)=(X+10)/(X+9)+(X+6)/(X+5)这类方程重在运算的技巧性,观察分母7+9=10+6;6+8=5+9所以先移项:(X+7)/(X+6
（2x+5)(4x*x-10x+25)=8x(x*x+1)8x^3-20x^2+50x+20x^2-50x+125=8x^3+8x,8x=125,x=125/8或利用立方和公式8x^3+125=8x^
5x/(x²+x-6)+(2x-5)/(x²-x-12)=(7x-10)/(x²-6x+8)5x/[(x+3)(x-2)]+(2x-5)/[(x-4)(x+3)]=(7x
(x^2+5x)^2+10x^2+50x+24=0(x^2+5x)^2+10(x^2+5x)+24=0设(x^2+5x)=y即y^2+10y+24=0(y+4)(y+6)=0y1=-4,y2=-6x^
1/4x+50％x=5/81/4x+1/2x=5/83/4x=5/8x=5/8÷3/4x=5/6不懂的欢迎追问..
3x+10=8x-53x-8x=-5-155x=15x=3
5x-24+x-(240-8x-2x+30)=106x-24-(270-10x)=1016x-294=1016x=304x=19再问：为什么是+30而不是-30啊？乘号在前面不变号吧？再答：-2×(x
355-【（50-x）×8】=5x355-（50-x）×8=5x355-400+8x=5x8x-5x=400-3553x=45x=15
1/x(x+2)+1/(x+2)(x+4)+...1/(x+8)(x+10)=5/24½×[1/x-1/(x+2)]+½[1/(x+2)-1/(x+4)]+……+½[1/