问题 解答题
解方程:
5
7
=
x
35
2x+3×0.9=24.724x-17.6x=23.04.
答案

(1)

5
7
=
x
35

      7x=5×35,

   7x÷7=5×35÷7,

       x=25;

(2)2x+3×0.9=24.7,

        2x+2.7=24.7,

    2x+2.7-2.7=24.7-2.7,

            2x=22,

         2x÷2=22÷2,

             x=11;

(3)24x-17.6x=23.04,

          6.4x=23.04,

     6.4x÷6.4=23.04÷6.4,

             x=3.6.

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