| ( | x | − | 7 100 | ) | ( | 19601 100 | − | 2041 10 | ) | = | ( | 8 100 | − | 7 100 | ) | ( | 998 5 | − | 2041 10 | ) |
| 方程左边 = | x | ( | 19601 100 | − | 2041 10 | ) | − | 7 100 | ( | 19601 100 | − | 2041 10 | ) |
| = | x | × | 19601 100 | − | x | × | 2041 10 | − | 7 100 | ( | 19601 100 | − | 2041 10 | ) |
| = | - | 809 100 | x | − | 7 100 | ( | 19601 100 | − | 2041 10 | ) |
| = | - | 809 100 | x | − | 7 100 | × | 19601 100 | + | 7 100 | × | 2041 10 |
| = | - | 809 100 | x | − | 137207 10000 | + | 14287 1000 |
| = | - | 809 100 | x | + | 5663 10000 |
| - | 809 100 | x | + | 5663 10000 | = | ( | 8 100 | − | 7 100 | ) | ( | 998 5 | − | 2041 10 | ) |
| 方程右边 = | 8 100 | ( | 998 5 | − | 2041 10 | ) | − | 7 100 | ( | 998 5 | − | 2041 10 | ) |
| = | 8 100 | × | 998 5 | − | 8 100 | × | 2041 10 | − | 7 100 | ( | 998 5 | − | 2041 10 | ) |
| = | 1996 125 | − | 2041 125 | − | 7 100 | ( | 998 5 | − | 2041 10 | ) |
| = | - | 9 25 | − | 7 100 | ( | 998 5 | − | 2041 10 | ) |
| = | - | 9 25 | − | 7 100 | × | 998 5 | + | 7 100 | × | 2041 10 |
| = | - | 9 25 | − | 3493 250 | + | 14287 1000 |
| = | - | 9 200 |
| - | 809 100 | x | + | 5663 10000 | = | - | 9 200 |
| - | 809 100 | x | = | - | 9 200 | − | 5663 10000 |
| - | 809 100 | x | = | - | 6113 10000 |
6113 10000 | = | 809 100 | x |
809 100 | x | = | 6113 10000 |
| x | = | 6113 10000 | ÷ | 809 100 |
| = | 6113 10000 | × | 100 809 |
| = | 6113 100 | × | 1 809 |
| x | = | 6113 80900 |
| x | = | 0.075562 |