| ( | ( | x | ÷ | 50 | ) | + | ( | 180 | − | x | ) | ÷ | 40 | ) | ÷ | ( | x | ÷ | 9 5 | × | 50 | + | ( | 180 | − | x | ) | ÷ | 2 | × | 40 | ) | = | 19 10 |
| 方程两边同时乘以: | ( | x | ÷ | 9 5 | × | 50 | + | ( | 180 | − | x | ) | ÷ | 2 | × | 40 | ) |
| ( | ( | x | ÷ | 50 | ) | + | ( | 180 | − | x | ) | ÷ | 40 | ) | = | 19 10 | ( | x | ÷ | 9 5 | × | 50 | + | ( | 180 | − | x | ) | ÷ | 2 | × | 40 | ) |
| ( | x | ÷ | 50 | ) | + | ( | 180 | − | x | ) | ÷ | 40 | = | 19 10 | ( | x | ÷ | 9 5 | × | 50 | + | ( | 180 | − | x | ) | ÷ | 2 | × | 40 | ) |
| ( | x | ÷ | 50 | ) | + | ( | 180 | − | x | ) | ÷ | 40 | = | 19 10 | x | ÷ | 9 5 | × | 50 | + | 19 10 | ( | 180 | − | x | ) | ÷ | 2 | × | 40 |
| ( | x | ÷ | 50 | ) | + | ( | 180 | − | x | ) | × | 1 40 | = | 475 9 | x | + | 38 | ( | 180 | − | x | ) |
| x | ÷ | 50 | + | ( | 180 | − | x | ) | × | 1 40 | = | 475 9 | x | + | 38 | ( | 180 | − | x | ) |
| x | ÷ | 50 | + | ( | 180 | − | x | ) | × | 1 40 | = | 475 9 | x | + | 38 | × | 180 | − | 38 | x |
| x | × | 1 50 | + | ( | 180 | − | x | ) | × | 1 40 | = | 475 9 | x | + | 6840 | − | 38 | x |
1 50 | x | + | ( | 180 | − | x | ) | × | 1 40 | = | 133 9 | x | + | 6840 |
1 50 | x | + | 180 | × | 1 40 | − | x | × | 1 40 | = | 133 9 | x | + | 6840 |
1 50 | x | + | 9 2 | − | x | × | 1 40 | = | 133 9 | x | + | 6840 |
| - | 1 200 | x | + | 9 2 | = | 133 9 | x | + | 6840 |
| - | 1 200 | x | − | 133 9 | x | = | 6840 | − | 9 2 |
| - | 26609 1800 | x | = | 6840 | − | 9 2 |
| - | 26609 1800 | x | = | 13671 2 |
| - | 13671 2 | = | 26609 1800 | x |
26609 1800 | x | = | - | 13671 2 |
| x | = | - | 13671 2 | ÷ | 26609 1800 |
| = | - | 13671 2 | × | 1800 26609 |
| = | - | 13671 | × | 900 26609 |
| x | = | - | 12303900 26609 |
| x | = | - 462.396182 |