题目内容
解方程.
x=
x÷
=
5x-3.9=1.5
x-
=
.
| 2 |
| 7 |
| 2 |
| 3 |
x÷
| 3 |
| 4 |
| 5 |
| 3 |
5x-3.9=1.5
x-
| 13 |
| 3 |
| 2 |
| 3 |
①
x=
x×
=
×
x=
;
②x÷
=
x=
×
x=
;
③5x-3.9=1.5
5x=1.5+3.9
5x÷5=5.4÷5
x=0.9;
④x-
=
x=
+
x=
x=5.
| 2 |
| 7 |
| 2 |
| 3 |
| 2 |
| 7 |
| 7 |
| 2 |
| 2 |
| 3 |
| 7 |
| 2 |
x=
| 7 |
| 3 |
②x÷
| 3 |
| 4 |
| 5 |
| 3 |
x=
| 5 |
| 3 |
| 3 |
| 4 |
x=
| 5 |
| 4 |
③5x-3.9=1.5
5x=1.5+3.9
5x÷5=5.4÷5
x=0.9;
④x-
| 13 |
| 3 |
| 2 |
| 3 |
x=
| 2 |
| 3 |
| 13 |
| 3 |
x=
| 15 |
| 3 |
x=5.
练习册系列答案
相关题目