| x | = | ( | 448 5 | × | 4 | × | 141 100 | ) | ÷ | ( | 6 | − | 9 20 | ) |
| 方程两边同时乘以: | ( | 6 | − | 9 20 | ) |
| x | ( | 6 | − | 9 20 | ) | = | ( | 448 5 | × | 4 | × | 141 100 | ) |
| x | × | 6 | − | x | × | 9 20 | = | ( | 448 5 | × | 4 | × | 141 100 | ) |
| x | × | 6 | − | x | × | 9 20 | = | 448 5 | × | 4 | × | 141 100 |
| x | × | 6 | − | x | × | 9 20 | = | 63168 125 |
111 20 | x | = | 63168 125 |
| x | = | 63168 125 | ÷ | 111 20 |
| = | 63168 125 | × | 20 111 |
| = | 21056 25 | × | 4 37 |
| x | = | 84224 925 |
| x | = | 91.052973 |