题目内容
解方程
x=10
x-
x=
x×
=34
2x+5x=
.
| 2 |
| 3 |
x-
| 1 |
| 4 |
| 1 |
| 2 |
x×
| 17 |
| 23 |
2x+5x=
| 7 |
| 10 |
(1)
X=10,
X×
=10×
,
X=15;
(2)X-
X=
,
X=
,
X×
=
×
,
X=
;
(3)X×
=34,
X×
×
=34×
,
X=46;
(4)2X+5X=
,
7X=
,
7X÷7=
÷7,
X=
.
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 2 |
| 3 |
| 2 |
X=15;
(2)X-
| 1 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 4 |
| 3 |
| 1 |
| 2 |
| 4 |
| 3 |
X=
| 2 |
| 3 |
(3)X×
| 17 |
| 23 |
X×
| 17 |
| 23 |
| 23 |
| 17 |
| 23 |
| 17 |
X=46;
(4)2X+5X=
| 7 |
| 10 |
7X=
| 7 |
| 10 |
7X÷7=
| 7 |
| 10 |
X=
| 1 |
| 10 |
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