题目内容
求未知数Χ的值.
①
=
②15.5-
x=0.5.
①
| x |
| 12.5 |
| 8 |
| 0.4 |
②15.5-
| 1 |
| 3 |
(1)
=
,
0.4x=12.5×8,
x=
,
x=250,
(2)15.5-
x=0.5,
15.5-
x=0.5+
x,
0.5+
x-0.5=15.5-0.5,
x=15,
x×3=15×3,
x=45.
| x |
| 12.5 |
| 8 |
| 0.4 |
0.4x=12.5×8,
x=
| 12.5×8 |
| 0.4 |
x=250,
(2)15.5-
| 1 |
| 3 |
15.5-
| 1 |
| 3 |
| 1 |
| 3 |
0.5+
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=45.
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