题目内容
求未知数X的值
4x+
=
=
:
.
4x+
| 1 |
| 4 |
| 1 |
| 2 |
| X |
| 21 |
| 4 |
| 9 |
| 1 |
| 6 |
(1)4x+
=
,
4x+
-
=
-
,
4x÷4=
÷4,
x=
;
(2)
=
:
,
x:21=
:
,
x=
,
x÷
=
÷
,
x=56.
| 1 |
| 4 |
| 1 |
| 2 |
4x+
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
4x÷4=
| 1 |
| 4 |
x=
| 1 |
| 16 |
(2)
| x |
| 21 |
| 4 |
| 9 |
| 1 |
| 6 |
x:21=
| 4 |
| 9 |
| 1 |
| 6 |
| 1 |
| 6 |
| 28 |
| 3 |
| 1 |
| 6 |
| 1 |
| 6 |
| 28 |
| 3 |
| 1 |
| 6 |
x=56.
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