| ( | 65 | + | 98 | ) | ÷ | 31 | × | x | + | 237 2 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 69 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1415 |
| 方程左边 = | ( | 65 | + | 98 | ) | × | 1 31 | x | + | 237 62 | ( | x | + | 15 | ) | + | 69 31 | ( | x | + | 30 | ) |
| ( | 65 | + | 98 | ) | × | 1 31 | x | + | 237 62 | ( | x | + | 15 | ) | + | 69 31 | ( | x | + | 30 | ) | = | 1415 |
| 方程左边 = | 65 | × | 1 31 | x | + | 98 | × | 1 31 | x | + | 237 62 | ( | x | + | 15 | ) | + | 69 31 | ( | x | + | 30 | ) |
| = | 65 31 | x | + | 98 31 | x | + | 237 62 | ( | x | + | 15 | ) | + | 69 31 | ( | x | + | 30 | ) |
| = | 163 31 | x | + | 237 62 | ( | x | + | 15 | ) | + | 69 31 | ( | x | + | 30 | ) |
| = | 163 31 | x | + | 237 62 | x | + | 237 62 | × | 15 | + | 69 31 | ( | x | + | 30 | ) |
| = | 163 31 | x | + | 237 62 | x | + | 3555 62 | + | 69 31 | ( | x | + | 30 | ) |
| = | 563 62 | x | + | 3555 62 | + | 69 31 | ( | x | + | 30 | ) |
| = | 563 62 | x | + | 3555 62 | + | 69 31 | x | + | 69 31 | × | 30 |
| = | 563 62 | x | + | 3555 62 | + | 69 31 | x | + | 2070 31 |
| = | 701 62 | x | + | 7695 62 |
701 62 | x | + | 7695 62 | = | 1415 |
701 62 | x | = | 1415 | − | 7695 62 |
701 62 | x | = | 80035 62 |
| x | = | 80035 62 | ÷ | 701 62 |
| = | 80035 62 | × | 62 701 |
| = | 80035 | × | 1 701 |
| x | = | 80035 701 |
| x | = | 114.172611 |