题目内容
求未知数X
3X-2.1=1.44
:X=
:2.
3X-2.1=1.44
| 27 |
| 5 |
| 9 |
| 5 |
(1)3X-2.1=1.44,
3X-2.1+2.1=1.44+2.1,
3x=3.54,
3x÷3=3.54÷3,
x=1.18;
(2)
:X=
:2,
x=
×2,
x=
,
x÷
=
÷
,
x=6.
3X-2.1+2.1=1.44+2.1,
3x=3.54,
3x÷3=3.54÷3,
x=1.18;
(2)
| 27 |
| 5 |
| 9 |
| 5 |
| 9 |
| 5 |
| 27 |
| 5 |
| 9 |
| 5 |
| 54 |
| 5 |
| 9 |
| 5 |
| 9 |
| 5 |
| 54 |
| 5 |
| 9 |
| 5 |
x=6.
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