问题 解答题
解方程:
4.9+0.5x=5.61-75%x=0.75
4
0.6
=x:
9
10
答案

(1)4.9+0.5x=5.6,

     4.9+0.5x-4.9=5.6-4.9,

        0.5x÷0.5=0.7÷0.5,

                x=1.4;

(2)1-75%x=0.75,

 1-75%x+75%=0.75+75%x,

     1-0.75=0.75+75%x-0.75,

  0.25÷75%=75%x÷75%,

          x=

1
3

(3)

4
0.6
=x:
9
10

      0.6x=4×

9
10

 0.6x÷0.6=

18
5
÷0.6,

         x=6.

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