Question

帮忙解下题，重谢

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Answer 1

1.  5x=3(x-2)

   5x=3x-6

   2x=-6

   x=-3

2. 1.5*1200-1200=10*1.5x

   15x=600

   x=40

3. 4-x=2x+1

   2x=3

   x=1

4. 3+x=5(1-x)

   3+x=5-5x

   6x=2

   x=1/3

5. 2-x=-3(x-2)

   2-x=-3x+6

   4x=-4

   x=-1

6. x+2=2

   x=0

7. x(x+1)+1=xx-1

   xx+x+1=xx-1

   x=-2

8. x(2x+3)=2x(x+1)+(2x+3)(x+1)

   2xx+3x=2xx+2x+2xx+5x+3

   2xx+4x+3=0

   无解
   

9. (x+2)(x+2)+16=-(xx-4)

   xx+4x+4+16=-xx+4

   2xx+4x+16=0

   xx+2x+8=0

   无解

10. 看不清
    

    
    

    
    

追问

追答

10. (2x+2)/x-(x+2)/(x-2)=(xx-2)/(xx-2x)
(2x+2)(x-2)-x(x+2)=xx-2
2xx-2x-4-xx-2x=xx-2
4x=-2
x=-1/2