| ( | 173 | + | 889 2 | ) | ÷ | 31 | × | x | + | 114 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 93 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1099 |
| 方程左边 = | ( | 173 | + | 889 2 | ) | × | 1 31 | x | + | 114 31 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| ( | 173 | + | 889 2 | ) | × | 1 31 | x | + | 114 31 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) | = | 1099 |
| 方程左边 = | 173 | × | 1 31 | x | + | 889 2 | × | 1 31 | x | + | 114 31 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 173 31 | x | + | 889 62 | x | + | 114 31 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 1235 62 | x | + | 114 31 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 1235 62 | x | + | 114 31 | x | + | 114 31 | × | 15 | + | 3 | ( | x | + | 30 | ) |
| = | 1235 62 | x | + | 114 31 | x | + | 1710 31 | + | 3 | ( | x | + | 30 | ) |
| = | 1463 62 | x | + | 1710 31 | + | 3 | ( | x | + | 30 | ) |
| = | 1463 62 | x | + | 1710 31 | + | 3 | x | + | 3 | × | 30 |
| = | 1463 62 | x | + | 1710 31 | + | 3 | x | + | 90 |
| = | 1649 62 | x | + | 4500 31 |
1649 62 | x | + | 4500 31 | = | 1099 |
1649 62 | x | = | 1099 | − | 4500 31 |
1649 62 | x | = | 29569 31 |
| x | = | 29569 31 | ÷ | 1649 62 |
| = | 29569 31 | × | 62 1649 |
| = | 29569 | × | 2 1649 |
| x | = | 59138 1649 |
| x | = | 35.862947 |