| ( | 154 | + | 889 2 | ) | ÷ | 31 | × | x | + | 186 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 93 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 2503 |
| 方程左边 = | ( | 154 | + | 889 2 | ) | × | 1 31 | x | + | 6 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| ( | 154 | + | 889 2 | ) | × | 1 31 | x | + | 6 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) | = | 2503 |
| 方程左边 = | 154 | × | 1 31 | x | + | 889 2 | × | 1 31 | x | + | 6 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 154 31 | x | + | 889 62 | x | + | 6 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 1197 62 | x | + | 6 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
| = | 1197 62 | x | + | 6 | x | + | 6 | × | 15 | + | 3 | ( | x | + | 30 | ) |
| = | 1197 62 | x | + | 6 | x | + | 90 | + | 3 | ( | x | + | 30 | ) |
| = | 1569 62 | x | + | 90 | + | 3 | ( | x | + | 30 | ) |
| = | 1569 62 | x | + | 90 | + | 3 | x | + | 3 | × | 30 |
| = | 1569 62 | x | + | 90 | + | 3 | x | + | 90 |
| = | 1755 62 | x | + | 180 |
1755 62 | x | + | 180 | = | 2503 |
1755 62 | x | = | 2503 | − | 180 |
1755 62 | x | = | 2323 |
| x | = | 2323 | ÷ | 1755 62 |
| = | 2323 | × | 62 1755 |
| x | = | 144026 1755 |
| x | = | 82.066097 |