题目内容
解方程或比例.
=
x-1.5=11.5
x-(1-80%)x=4.95.
| 3.6 |
| 4 |
| x |
| 5 |
| 1 |
| 2 |
| 3 |
| 4 |
(1)
=
,
4x=5×3.6,
4x=18,
x=4.5;
(2)
x-1.5=11.5,
x=11.5-1.5,
x=10,
x=20;
(3)
x-(1-80%)x=4.95,
x-20%x=4.95,
x-
x=4.95,
x=4.95,
x=9;
| 3.6 |
| 4 |
| x |
| 5 |
4x=5×3.6,
4x=18,
x=4.5;
(2)
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=20;
(3)
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 5 |
| 11 |
| 20 |
x=9;
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