问题 解答题
解方程x-
5
6
=
1
6
               x+3.5×2=12               0.6x-0.5=3.1.
答案

(1)x-

5
6
=
1
6

      x-

5
6
+
5
6
=
1
6
+
5
6

           x=1;

(2)x+3.5×2=12,

          x+7=12,

        x+7-7=12-7,

            x=5;

(3)0.6x-0.5=3.1,

 0.6x-0.5+0.5=3.1+0.5,

         0.6x=3.6,

    0.6x÷0.6=3.6÷0.6,

            x=6.

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