| ( | x | + | 70 | ) | ÷ | ( | 19200 | + | x | ) | = | 5303 500000 |
| 方程两边同时乘以: | ( | 19200 | + | x | ) |
| ( | x | + | 70 | ) | = | 5303 500000 | ( | 19200 | + | x | ) |
| x | + | 70 | = | 5303 500000 | ( | 19200 | + | x | ) |
| x | + | 70 | = | 5303 500000 | × | 19200 | + | 5303 500000 | x |
| x | + | 70 | = | 127272 625 | + | 5303 500000 | x |
| x | − | 5303 500000 | x | = | 127272 625 | − | 70 |
494697 500000 | x | = | 127272 625 | − | 70 |
494697 500000 | x | = | 83522 625 |
| x | = | 83522 625 | ÷ | 494697 500000 |
| = | 83522 625 | × | 500000 494697 |
| = | 83522 | × | 800 494697 |
| x | = | 66817600 494697 |
| x | = | 135.067728 |