| x | ( | 100 | ÷ | ( | 4157 500 | × | 375 | ) | ) | = | 12 5 | ( | 38 5 | ÷ | 135 | ) |
| x | × | 100 | ÷ | ( | 4157 500 | × | 375 | ) | = | 12 5 | ( | 38 5 | ÷ | 135 | ) |
| x | × | 100 | ÷ | ( | 4157 500 | × | 375 | ) | = | 12 5 | × | 38 5 | ÷ | 135 |
| x | × | 100 | ÷ | ( | 4157 500 | × | 375 | ) | = | 152 1125 |
| 方程两边同时乘以: | ( | 4157 500 | × | 375 | ) |
| x | × | 100 | = | 152 1125 | ( | 4157 500 | × | 375 | ) |
| x | × | 100 | = | 152 1125 | × | 4157 500 | × | 375 |
| x | × | 100 | = | 157966 375 |
| x | = | 157966 375 | ÷ | 100 |
| = | 157966 375 | × | 1 100 |
| = | 78983 375 | × | 1 50 |
| x | = | 78983 18750 |
| x | = | 4.212427 |