题目内容
求未知数x的值.
(1)12:
=x:
(2)
x+
x=84
(3)4x-0.8×6=25.2.
(1)12:
| 3 |
| 5 |
| 1 |
| 2 |
(2)
| 2 |
| 3 |
| 1 |
| 2 |
(3)4x-0.8×6=25.2.
(1)12:
=x:
,
x=12×
,
x÷
=6÷
,
x=10;
(2)
x+
x=84,
x=84,
x÷
=84÷
,
x=72;
(3)4x-0.8×6=25.2,
4x-4.8+4.8=25.2+4.8,
4x÷4=30÷4,
x=7.5.
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=10;
(2)
| 2 |
| 3 |
| 1 |
| 2 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
x=72;
(3)4x-0.8×6=25.2,
4x-4.8+4.8=25.2+4.8,
4x÷4=30÷4,
x=7.5.
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