| x | = | 150 | ( | 35 | − | 1000 | x | ) | ( | 27 | − | 1000 | x | ) |
| 方程右边 = | 150 | × | 35 | ( | 27 | − | 1000 | x | ) | − | 150 | × | 1000 | x | ( | 27 | − | 1000 | x | ) |
| = | 5250 | ( | 27 | − | 1000 | x | ) | − | 150000 | x | ( | 27 | − | 1000 | x | ) |
| = | 5250 | × | 27 | − | 5250 | × | 1000 | x | − | 150000 | x | ( | 27 | − | 1000 | x | ) |
| = | 141750 | − | 5250000 | x | − | 150000 | x | ( | 27 | − | 1000 | x | ) |
| = | 141750 | − | 5250000 | x | − | 150000 | x | × | 27 | + | 150000 | x | × | 1000 | x |
| = | 141750 | − | 5250000 | x | − | 4050000 | x | + | 150000000 | x | x |
| = | 141750 | − | 9300000 | x | + | 150000000 | x | x |
| x | = | 141750 | − | 9300000 | x | + | 150000000 | x | x |