| ( | 163 | + | 279 | ) | ÷ | 31 | × | x | + | 481 2 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 124 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1713 |
| 方程左边 = | ( | 163 | + | 279 | ) | × | 1 31 | x | + | 481 62 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 163 | + | 279 | ) | × | 1 31 | x | + | 481 62 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 1713 |
| 方程左边 = | 163 | × | 1 31 | x | + | 279 | × | 1 31 | x | + | 481 62 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 163 31 | x | + | 9 | x | + | 481 62 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 442 31 | x | + | 481 62 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 442 31 | x | + | 481 62 | x | + | 481 62 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 442 31 | x | + | 481 62 | x | + | 7215 62 | + | 4 | ( | x | + | 30 | ) |
| = | 1365 62 | x | + | 7215 62 | + | 4 | ( | x | + | 30 | ) |
| = | 1365 62 | x | + | 7215 62 | + | 4 | x | + | 4 | × | 30 |
| = | 1365 62 | x | + | 7215 62 | + | 4 | x | + | 120 |
| = | 1613 62 | x | + | 14655 62 |
1613 62 | x | + | 14655 62 | = | 1713 |
1613 62 | x | = | 1713 | − | 14655 62 |
1613 62 | x | = | 91551 62 |
| x | = | 91551 62 | ÷ | 1613 62 |
| = | 91551 62 | × | 62 1613 |
| = | 91551 | × | 1 1613 |
| x | = | 91551 1613 |
| x | = | 56.758215 |