问题 解答题
解方程.
3
8
-5x=0.125
②x:0.2=
5
8
答案

(1)

3
8
-5x=0.125,

      

3
8
-5x+5x=0.125+5x,

     

3
8
-0.125=0.125+5x-0.125,

          0.25=5x,

       0.25÷5=5x÷5,

             x=0.05;

(2)x:0.2=

5
8

         8x=0.2×5,

         8x=1,

      8x÷8=1÷8,

          x=0.125.

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