题目内容
解方程
5x-3x=3.2
+x=
-x=
x-
=
.
5x-3x=3.2
| 2 |
| 7 |
| 11 |
| 21 |
| 7 |
| 9 |
| 4 |
| 27 |
x-
| 5 |
| 12 |
| 7 |
| 24 |
(1)5x-3x=3.2,
2x=3.2,
2x÷2=3.2÷2,
x=1.6;
(2)
+x=
,
+x-
=
-
,
x=
;
(3)
- x=
,
- x-
=
-
,
x=
;
(4)x-
=
,
x-
+
=
+
,
x=
.
2x=3.2,
2x÷2=3.2÷2,
x=1.6;
(2)
| 2 |
| 7 |
| 11 |
| 21 |
| 2 |
| 7 |
| 2 |
| 7 |
| 11 |
| 21 |
| 2 |
| 7 |
x=
| 5 |
| 21 |
(3)
| 7 |
| 9 |
| 4 |
| 27 |
| 7 |
| 9 |
| 7 |
| 9 |
| 4 |
| 27 |
| 7 |
| 9 |
x=
| 17 |
| 27 |
(4)x-
| 5 |
| 12 |
| 7 |
| 24 |
x-
| 5 |
| 12 |
| 5 |
| 12 |
| 7 |
| 24 |
| 5 |
| 12 |
x=
| 17 |
| 24 |
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