题目内容
求未知数:
:x=
:
0.85×6-4x=3.5.
| 5 |
| 12 |
| 1 |
| 5 |
| 9 |
| 20 |
0.85×6-4x=3.5.
(1)
:x=
:
,
x=
×
,
x×5=
×
×5,
x=
;
(2)0.85×6-4x=3.5,
5.1-4x=3.5,
5.1-4x+4x-3.5=3.5+4x-3.5,
1.6=4x,
4x=1.6,
4x÷4=1.6÷4,
x=0.4.
| 5 |
| 12 |
| 1 |
| 5 |
| 9 |
| 20 |
| 1 |
| 5 |
| 5 |
| 12 |
| 9 |
| 20 |
| 1 |
| 5 |
| 5 |
| 12 |
| 9 |
| 20 |
x=
| 15 |
| 16 |
(2)0.85×6-4x=3.5,
5.1-4x=3.5,
5.1-4x+4x-3.5=3.5+4x-3.5,
1.6=4x,
4x=1.6,
4x÷4=1.6÷4,
x=0.4.
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