题目内容
求下列各式中的x.
| 7.6-4x=3.6 | 2
|
(1)
x-
x=
,
(
-
)x=
,
x=
,
x×
=
×
,
x=2;
(2)7.6-4x=3.6,
7.6-4x+4x=3.6+4x,
3.6+4x=7.6,
3.6+4x-3.6=7.6-3.6,
4x=4,
4x÷4=4÷4,
x=1;
(3)2
:x=5:4,
5x=
×4,
5x=10,
5x÷5=10÷5,
x=2.
| 3 |
| 8 |
| 3 |
| 16 |
| 3 |
| 8 |
(
| 3 |
| 8 |
| 3 |
| 16 |
| 3 |
| 8 |
| 3 |
| 16 |
| 3 |
| 8 |
| 3 |
| 16 |
| 16 |
| 3 |
| 3 |
| 8 |
| 16 |
| 3 |
x=2;
(2)7.6-4x=3.6,
7.6-4x+4x=3.6+4x,
3.6+4x=7.6,
3.6+4x-3.6=7.6-3.6,
4x=4,
4x÷4=4÷4,
x=1;
(3)2
| 1 |
| 2 |
5x=
| 5 |
| 2 |
5x=10,
5x÷5=10÷5,
x=2.
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