题目内容
求未知数x
x-1=0.2x:
=21:
x-
x=21.
| 1 |
| 8 |
| 5 |
| 14 |
| 5 |
| 8 |
| 1 |
| 8 |
(1)
x-1=0.2,
x-1+1=0.2+1,
x÷
=1.2÷
,
x=9.6;
(2)x:
=21:
,
x=21×
,
x÷
=
÷
,
x=12;
(3)x-
x=21,
x÷
=21÷
,
x=24.
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
x=9.6;
(2)x:
| 5 |
| 14 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 14 |
| 5 |
| 8 |
| 5 |
| 8 |
| 15 |
| 2 |
| 5 |
| 8 |
x=12;
(3)x-
| 1 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
| 7 |
| 8 |
x=24.
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