题目内容
求未知数x.
(1)
÷x=
(2)
-14.5=5.5.
(1)
| 1 |
| 3 |
| 3 |
| 8 |
(2)
| x |
| 8 |
(1)
÷x=
,
÷x×x=
×x,
x=
,
x÷
=
÷
,
x=
×
,
x=
;
(2)
-14.5=5.5,
-14.5+14.5=5.5+14.5,
=20,
×8=20×8,
x=160.
| 1 |
| 3 |
| 3 |
| 8 |
| 1 |
| 3 |
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 3 |
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 3 |
| 3 |
| 8 |
x=
| 1 |
| 3 |
| 8 |
| 3 |
x=
| 8 |
| 9 |
(2)
| x |
| 8 |
| x |
| 8 |
| x |
| 8 |
| x |
| 8 |
x=160.
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