搜狗做题网5x(x-8)=100解一下
来源：学生作业帮助网 编辑：作业帮 时间：2024/06/30 17:10:36
8X+（20-x）×5=1348x+100-5x=1348x-5x=134-1003x=34x=34/3在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.再问：可不可以讲解一下呢
(x-1)*(3x+5)=0x-1=0x=13x+5=0x=-5/3答案为x=1或x=-5/3
17(2-3x)-5(12-x)=8(1-x)34-51x-60+5x=8-8x38x=-34x=-17/19再问：打错了后面是8（1-7x)再答：17(2-3x)-5(12-x)=8(1-7x)34
[1-1/(x-4)]+[1-1/(x-8)]=[1-1/(x-7)]+[1-1/(x-5)]1/(x-4)+1/(x-8)=1/(x-7)+1/(x-5)(x-4+x-8)/(x-4)(x-8)=(
两边同时乘以35得:7(8x+4)=5(11x+1)+3556x+28=55x+4056x-55x=40-28x=12
/>因为：x-5/x-6+x-8/x-9=x-7/x-8+x-6/x-7,所以：1+1/(x-6)+1+1/(x-9)=1+1/(x-8)+1+1/(x-7)即：1/(x-6）+1/(x-9)=1/(
25=5xx=25/5x=5
这道题不用那么复杂.先移项.(x-4)/(x-5)-(x-5)/(x-6)=(x-7)/(x-8)-(x-8)/( x-9)再通分.（x-4)(x-6)/(x-5)(x-6)-(x-5)(x
x+25=24+3x+3x+25=3x+273x-x=25-272x=-2x=-1再问：是x+25=3x*(8+x)+3.........再答：一元二次啊。。。x+25=24x+3x^2+33x^2+
X=-4X=89X=5X=-8Y=-2X=1/4X=1/2X=12/5
3.5x+8=12+x解3.5x-x=12-82.5x=4x=4÷2.5x=1.6
左右两边同乘以(X-5)(X-6)(X-8)(X-9)得到(X-4)(X-6)(X-8)(X-9)-(X-5)(X-5)(X-8)(X-9)=(X-5)(X-6)(X-7)(X-9)-(X-5)(X-
(x-4)/(x-5)-(x-5)/(x-6)=(x-7)/(x-8)-(x-8)/(x-9)1+1/(x-5)-1-1/(x-6)=1+1/(x-8)-1-1/(x-9)1/(x-5)-1/(x-6
8x+5x+8.5*5=8813x+42.5=8813x=88-42.513x=45.5x=45.5/13x=3.5
x-4/x-5-x-5/x-6=x-7/x-8-x-8/x-91+1/x-5-1-1/x-6=1+1/x-8-1-1/x-91/x-5-1/x-6=1/x-8-1/x-9-1/(x-5)(x-6)=-
(x-4)/(x-5)+(x-8)/(x-9)=(x-7)/(x-8)+(x-5)/(x-6)1+1/(x-5)+1+1/(x-9)=1+1/(x-8)+1+1/(x-6)1/(x-5)+1/(x-9
8x=6(x+8)8x=6x+488x-6x=482x=48x=48÷2x=24