题目内容
求未知数X.
|
| 1.25+0.25x=4. |
(1)
x-
x=
,
x=
,
x×
=
×
,
x=1
;
(2)
:
=27:x,
x=
×27,
x×5=6×5,
x=30;
(3)1.25+0.25x=4,
1.25+0.25x-1.25=4-1.25,
0.25x÷0.25=2.75÷0.25,
x=11.
| 3 |
| 4 |
| 1 |
| 3 |
| 5 |
| 9 |
| 5 |
| 12 |
| 5 |
| 9 |
| 5 |
| 12 |
| 12 |
| 5 |
| 5 |
| 9 |
| 12 |
| 5 |
x=1
| 1 |
| 3 |
(2)
| 1 |
| 5 |
| 2 |
| 9 |
| 1 |
| 5 |
| 2 |
| 9 |
| 1 |
| 5 |
x=30;
(3)1.25+0.25x=4,
1.25+0.25x-1.25=4-1.25,
0.25x÷0.25=2.75÷0.25,
x=11.
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