题目内容
求未知数x.
×
-0.5x=
:
=x:
.
| 6 |
| 5 |
| 5 |
| 3 |
| 3 |
| 2 |
| 1 |
| 5 |
| 7 |
| 15 |
| 2 |
| 3 |
(1)
×
-0.5x=
,
0.5x=
×
-
,
0.5x=0.5,
0.5x÷0.5=0.5÷0.5,
x=1;
(2)
:
=x:
,
x=
×
,
x÷
=
×
÷
,
x=
×
×
,
x=
.
| 6 |
| 5 |
| 5 |
| 3 |
| 3 |
| 2 |
0.5x=
| 6 |
| 5 |
| 5 |
| 3 |
| 3 |
| 2 |
0.5x=0.5,
0.5x÷0.5=0.5÷0.5,
x=1;
(2)
| 1 |
| 5 |
| 7 |
| 15 |
| 2 |
| 3 |
| 7 |
| 15 |
| 1 |
| 5 |
| 2 |
| 3 |
| 7 |
| 15 |
| 7 |
| 15 |
| 1 |
| 5 |
| 2 |
| 3 |
| 7 |
| 15 |
x=
| 1 |
| 5 |
| 2 |
| 3 |
| 15 |
| 7 |
x=
| 2 |
| 7 |
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