题目内容
求未知数:
(1)x+
x=
(2)1
:4=x:3.5.
(1)x+
| 5 |
| 4 |
| 27 |
| 16 |
(2)1
| 3 |
| 5 |
(1)x+
x=
,
(1+
)x=
,
x=
,
x÷
=
÷
,
x=
×
,
x=
;
(2)1
:4=x:3.5,
1.6:4=x:3.5,
4x=1.6×3.5,
4x=5.6,
4x÷4=5.6÷4,
x=1.4.
| 5 |
| 4 |
| 27 |
| 16 |
(1+
| 5 |
| 4 |
| 27 |
| 16 |
| 9 |
| 4 |
| 27 |
| 16 |
| 9 |
| 4 |
| 9 |
| 4 |
| 27 |
| 16 |
| 9 |
| 4 |
x=
| 27 |
| 16 |
| 4 |
| 9 |
x=
| 3 |
| 4 |
(2)1
| 3 |
| 5 |
1.6:4=x:3.5,
4x=1.6×3.5,
4x=5.6,
4x÷4=5.6÷4,
x=1.4.
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