题目内容
求未知数X.
x-
| 5x-4.5×2=0.5 |
|
(1)x-
x=
,
x=
,
x×
=
×
,
x=
;
(2)5x-4.5×2=0.5.
5x-9=0.5,
5x-9+9=0.5+9,
5x÷5=9.5÷5,
x=1.9;
(3)
:x=
:
,
x=
×
,
x×10=
×10,
x=
.
| 1 |
| 5 |
| 3 |
| 10 |
| 4 |
| 5 |
| 3 |
| 10 |
| 4 |
| 5 |
| 5 |
| 4 |
| 3 |
| 10 |
| 5 |
| 4 |
x=
| 3 |
| 8 |
(2)5x-4.5×2=0.5.
5x-9=0.5,
5x-9+9=0.5+9,
5x÷5=9.5÷5,
x=1.9;
(3)
| 1 |
| 6 |
| 1 |
| 10 |
| 1 |
| 4 |
| 1 |
| 10 |
| 1 |
| 6 |
| 1 |
| 4 |
| 1 |
| 10 |
| 1 |
| 24 |
x=
| 5 |
| 12 |
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