题目内容
求下列各式中的x.(每小题3分,共6分.)
(1)x-20%x+7=17
(2)
:x=
:3.
(1)x-20%x+7=17
(2)
| 1 |
| 9 |
| 1 |
| 8 |
(1)x-20%x+7=17,
x+7-7=17-7,
x=10,
x×
=10×
,
x=12.5;
(2)
:x=
:3,
x=
×3,
x×8=
×8,
x=2
;
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 5 |
| 4 |
| 5 |
| 4 |
x=12.5;
(2)
| 1 |
| 9 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 9 |
| 1 |
| 8 |
| 1 |
| 3 |
x=2
| 2 |
| 3 |
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