| 225 | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | + | ( | 225 | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | ) | × | 8 | ( | 1 | − | 1 10 | a | ) | = | 5400 |
| 方程左边 = | 225 | + | 3150 | ( | 1 | − | 1 10 | a | ) | + | ( | 225 | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | ) | × | 8 | ( | 1 | − | 1 10 | a | ) |
| 225 | + | 3150 | ( | 1 | − | 1 10 | a | ) | + | ( | 225 | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | ) | × | 8 | ( | 1 | − | 1 10 | a | ) | = | 5400 |
| 方程左边 = | 225 | + | 3150 | × | 1 | − | 3150 | × | 1 10 | a | + | ( | 225 | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | ) | × | 8 | ( | 1 | − | 1 10 | a | ) |
| = | 225 | + | 3150 | − | 315 | a | + | ( | 225 | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | ) | × | 8 | ( | 1 | − | 1 10 | a | ) |
| = | 3375 | − | 315 | a | + | ( | 225 | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | ) | × | 8 | ( | 1 | − | 1 10 | a | ) |
| = | 3375 | − | 315 | a | + | 225 | × | 8 | ( | 1 | − | 1 10 | a | ) | + | 225 | × | 14 | ( | 1 | − | 1 10 | a | ) | × | 8 | ( | 1 | − | 1 10 | a | ) |
| = | 3375 | − | 315 | a | + | 1800 | ( | 1 | − | 1 10 | a | ) | + | 25200 | ( | 1 | − | 1 10 | a | ) | ( | 1 | − | 1 10 | a | ) |
| = | 3375 | − | 315 | a | + | 1800 | × | 1 | − | 1800 | × | 1 10 | a | + | 25200 | ( | 1 | − | 1 10 | a | ) | ( | 1 | − | 1 10 | a | ) |
| = | 3375 | − | 315 | a | + | 1800 | − | 180 | a | + | 25200 | ( | 1 | − | 1 10 | a | ) | ( | 1 | − | 1 10 | a | ) |
| = | 5175 | − | 495 | a | + | 25200 | ( | 1 | − | 1 10 | a | ) | ( | 1 | − | 1 10 | a | ) |
| = | 5175 | − | 495 | a | + | 25200 | × | 1 | ( | 1 | − | 1 10 | a | ) | − | 25200 | × | 1 10 | a | ( | 1 | − | 1 10 | a | ) |
| = | 5175 | − | 495 | a | + | 25200 | ( | 1 | − | 1 10 | a | ) | − | 2520 | a | ( | 1 | − | 1 10 | a | ) |
| = | 5175 | − | 495 | a | + | 25200 | × | 1 | − | 25200 | × | 1 10 | a | − | 2520 | a | ( | 1 | − | 1 10 | a | ) |
| = | 5175 | − | 495 | a | + | 25200 | − | 2520 | a | − | 2520 | a | ( | 1 | − | 1 10 | a | ) |
| = | 30375 | − | 3015 | a | − | 2520 | a | ( | 1 | − | 1 10 | a | ) |
| = | 30375 | − | 3015 | a | − | 2520 | a | × | 1 | + | 2520 | a | × | 1 10 | a |
| = | 30375 | − | 3015 | a | − | 2520 | a | + | 252 | a | a |
| = | 30375 | − | 5535 | a | + | 252 | a | a |
| 30375 | − | 5535 | a | + | 252 | a | a | = | 5400 |