题目内容
求未知数x
7x-4.5=9.5
x+
x=
:
=x:
.
7x-4.5=9.5
x+
| 1 |
| 5 |
| 12 |
| 25 |
| 3 |
| 5 |
| 6 |
| 7 |
| 5 |
| 4 |
(1)7x-4.5=9.5,
7x-4.5+4.5=9.5+4.5,
7x=14,
7x÷7=14÷7,
x=2;
(2)x+
x=
,
x=
,
x÷
=
÷
,
x=
;
(3)
:
=x:
,
x=
×
,
x÷
=
×
÷
,
x=
×
×
,
x=
.
7x-4.5+4.5=9.5+4.5,
7x=14,
7x÷7=14÷7,
x=2;
(2)x+
| 1 |
| 5 |
| 12 |
| 25 |
| 6 |
| 5 |
| 12 |
| 25 |
| 6 |
| 5 |
| 6 |
| 5 |
| 12 |
| 25 |
| 6 |
| 5 |
x=
| 2 |
| 5 |
(3)
| 3 |
| 5 |
| 6 |
| 7 |
| 5 |
| 4 |
| 6 |
| 7 |
| 5 |
| 4 |
| 3 |
| 5 |
| 6 |
| 7 |
| 6 |
| 7 |
| 5 |
| 4 |
| 3 |
| 5 |
| 6 |
| 7 |
x=
| 5 |
| 4 |
| 3 |
| 5 |
| 7 |
| 6 |
x=
| 7 |
| 8 |
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