| 7x−1 |
| 0.024 |
| 1−0.2x |
| 0.018 |
| 5x+1 |
| 0.012 |
两边同时乘以
| 1 |
| 1000 |
| 7x−1 |
| 24 |
| 1−0.2x |
| 18 |
| 5x+1 |
| 12 |
两边同时乘以72得：3（7x-1）=4（1-0.2x）-6（5x+1），
去括号得：21x-3=4-0.8x-30x-6，
移项、合并同类项得：51.8x=1，
系数化为1得：x=
| 5 |
| 259 |
| 7x−1 |
| 0.024 |
| 1−0.2x |
| 0.018 |
| 5x+1 |
| 0.012 |
| 7x−1 |
| 0.024 |
| 1−0.2x |
| 0.018 |
| 5x+1 |
| 0.012 |
| 1 |
| 1000 |
| 7x−1 |
| 24 |
| 1−0.2x |
| 18 |
| 5x+1 |
| 12 |
| 5 |
| 259 |