| ( | 300 | + | 36 | + | x | ) | × | 133 500 | = | x |
| 方程左边 = | 300 | × | 133 500 | + | 36 | × | 133 500 | + | x | × | 133 500 |
| = | 399 5 | + | 1197 125 | + | x | × | 133 500 |
| = | 11172 125 | + | 133 500 | x |
11172 125 | + | 133 500 | x | = | x |
133 500 | x | − | x | = | - | 11172 125 |
| - | 367 500 | x | = | - | 11172 125 |
11172 125 | = | 367 500 | x |
367 500 | x | = | 11172 125 |
| x | = | 11172 125 | ÷ | 367 500 |
| = | 11172 125 | × | 500 367 |
| = | 11172 | × | 4 367 |
| x | = | 44688 367 |
| x | = | 121.765668 |