题目内容
| 解方程. 3x÷
| x:
| ||||||
x×
| 2x+30%x=9.2. |
(1)3x÷
=
,
3x÷
×
=
×
,
3x÷3=
÷3,
x=
,
(2)x:
=49,
x÷
×
=49×
,
x=7;
(3)x×
×
=
,
x=
,
x×
=
×
,
x=
;
(4)2x+30%x=9.2,
2.3x=9.2,
2.3x÷2.3=9.2÷2.3,
x=4.
| 1 |
| 2 |
| 3 |
| 8 |
3x÷
| 1 |
| 2 |
| 1 |
| 2 |
| 3 |
| 8 |
| 1 |
| 2 |
3x÷3=
| 3 |
| 16 |
x=
| 1 |
| 16 |
(2)x:
| 1 |
| 7 |
x÷
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 7 |
x=7;
(3)x×
| 1 |
| 3 |
| 5 |
| 2 |
| 5 |
| 9 |
| 5 |
| 6 |
| 5 |
| 9 |
| 5 |
| 6 |
| 6 |
| 5 |
| 5 |
| 9 |
| 6 |
| 5 |
x=
| 2 |
| 3 |
(4)2x+30%x=9.2,
2.3x=9.2,
2.3x÷2.3=9.2÷2.3,
x=4.
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