题目内容
求未知数x.
(1)x-
x=
(2)
:x=0.75:3.
(1)x-
| 2 |
| 5 |
| 4 |
| 15 |
(2)
| 1 |
| 4 |
(1)x-
x=
,
x=
,
x×
=
×
,
x=
,
(2)
:x=0.75:3,
0.75x=
,
0.75x×
=
×
,
x=1,
| 2 |
| 5 |
| 4 |
| 15 |
| 3 |
| 5 |
| 4 |
| 15 |
| 3 |
| 5 |
| 5 |
| 3 |
| 4 |
| 15 |
| 5 |
| 3 |
x=
| 4 |
| 9 |
(2)
| 1 |
| 4 |
0.75x=
| 3 |
| 4 |
0.75x×
| 4 |
| 3 |
| 3 |
| 4 |
| 4 |
| 3 |
x=1,
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