题目内容

求x:
1
3
1
6
=8:x
(x+45)×3
1
5
=256
0.5x+1
1
8
×6=7
(1)
1
3
1
6
=8:x,
           
1
3
x=
1
6
×8,
         
1
3
x÷
1
3
=
4
3
÷
1
3

              x=4;

(2)(x+45)×3
1
5
=256,
          3
1
5
x+144=256,
      3
1
5
x+144-144=256-144,
          3
1
5
x÷3
1
5
=112÷3
1
5

                 x=35;

(3)0.5x+1
1
8
×6=7,
        0.5x+
27
4
=7,
    0.5x+
27
4
-
27
4
=7-
27
4

       0.5x÷0.5=0.25÷0.5,
               x=0.5.
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