题目内容
求未知数x.
(1)4x-8=2.4
(2)x-
x=
(3)42:
=x:
.
(1)4x-8=2.4
(2)x-
| 3 |
| 5 |
| 6 |
| 5 |
(3)42:
| 3 |
| 5 |
| 5 |
| 7 |
(1)4x-8=2.4,
4x-8+8=2.4+8,
4x=10.4,
4x÷4=10.4÷4,
x=2.6;
(2)x-
| 3 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
x=3;
(3)42:
| 3 |
| 5 |
| 5 |
| 7 |
| 3 |
| 5 |
| 5 |
| 7 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=50.
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