题目内容
解方程.
| 7x-
|
(1)
x+
x=35,
(
+
)x=35,
x=35,
x×
=35×
,
x=42;
(2)7x-
=
,
7x-
+
=
+
,
7x=
,
7x÷7=
÷7,
x=
.
| 1 |
| 2 |
| 1 |
| 3 |
(
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
| 5 |
| 6 |
| 6 |
| 5 |
| 6 |
| 5 |
x=42;
(2)7x-
| 4 |
| 5 |
| 5 |
| 6 |
7x-
| 4 |
| 5 |
| 4 |
| 5 |
| 5 |
| 6 |
| 4 |
| 5 |
7x=
| 49 |
| 30 |
7x÷7=
| 49 |
| 30 |
x=
| 7 |
| 30 |
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