| ( | 37 10 | + | x | ) | × | 3 2 | ÷ | 2 | + | ( | 3 5 | + | x | ) | × | 9 10 | ÷ | 2 | = | 129 25 |
| 方程左边 = | ( | 37 10 | + | x | ) | × | 3 4 | + | ( | 3 5 | + | x | ) | × | 9 20 |
| ( | 37 10 | + | x | ) | × | 3 4 | + | ( | 3 5 | + | x | ) | × | 9 20 | = | 129 25 |
| 方程左边 = | 37 10 | × | 3 4 | + | x | × | 3 4 | + | ( | 3 5 | + | x | ) | × | 9 20 |
| = | 111 40 | + | x | × | 3 4 | + | ( | 3 5 | + | x | ) | × | 9 20 |
| = | 111 40 | + | 3 4 | x | + | 3 5 | × | 9 20 | + | x | × | 9 20 |
| = | 111 40 | + | 3 4 | x | + | 27 100 | + | x | × | 9 20 |
| = | 609 200 | + | 6 5 | x |
609 200 | + | 6 5 | x | = | 129 25 |
6 5 | x | = | 129 25 | − | 609 200 |
6 5 | x | = | 423 200 |
| x | = | 423 200 | ÷ | 6 5 |
| = | 423 200 | × | 5 6 |
| = | 141 40 | × | 1 2 |
| x | = | 141 80 |
| x | = | 1.7625 |