题目内容
| 解方程. x-15%x=68 |
| 5x+2.1=4.5×3. |
(1)x-15%x=68
0.85x=68,
x=80;
(2)
x-
x=
x=
,
x=
;
(3)5x+2.1=4.5×3
5x+2.1=13.5,
5x=11.4,
x=2.28.
0.85x=68,
x=80;
(2)
| 3 |
| 5 |
| 1 |
| 4 |
| 3 |
| 10 |
| 7 |
| 20 |
| 3 |
| 10 |
x=
| 6 |
| 7 |
(3)5x+2.1=4.5×3
5x+2.1=13.5,
5x=11.4,
x=2.28.
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