Question

解方程12x-34=38  ...

解方程12x-34=38 45x+0.2x=23．

Answer 1

①

1

2

x-

3

4

=

3

8

  
   

1

2

x+

3

4

-

3

4

=

3

8

+

3

4

    

1

2

x×2=

9

8

×2
         x=2

1

4

                
②

4

5

x+0.2x=

2

3

0.8x+0.2x=

2

3

        x=

2

3