| ( | 186 | + | 627 2 | ) | ÷ | 31 | × | x | + | 248 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 124 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1855 |
| 方程左边 = | ( | 186 | + | 627 2 | ) | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| ( | 186 | + | 627 2 | ) | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 1855 |
| 方程左边 = | 186 | × | 1 31 | x | + | 627 2 | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 6 | x | + | 627 62 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 999 62 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
| = | 999 62 | x | + | 8 | x | + | 8 | × | 15 | + | 4 | ( | x | + | 30 | ) |
| = | 999 62 | x | + | 8 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 1495 62 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
| = | 1495 62 | x | + | 120 | + | 4 | x | + | 4 | × | 30 |
| = | 1495 62 | x | + | 120 | + | 4 | x | + | 120 |
| = | 1743 62 | x | + | 240 |
1743 62 | x | + | 240 | = | 1855 |
1743 62 | x | = | 1855 | − | 240 |
1743 62 | x | = | 1615 |
| x | = | 1615 | ÷ | 1743 62 |
| = | 1615 | × | 62 1743 |
| x | = | 100130 1743 |
| x | = | 57.446931 |