| ( | 318 25 | × | 259 25 | − | 2811 50 | − | 1121 50 | × | 9 2 | ) | ÷ | x | = | 1 |
| Multiply both sides of the equation by: | x |
| ( | 318 25 | × | 259 25 | − | 2811 50 | − | 1121 50 | × | 9 2 | ) | = | 1 | x |
318 25 | × | 259 25 | − | 2811 50 | − | 1121 50 | × | 9 2 | = | 1 | x |
82362 625 | − | 2811 50 | − | 10089 100 | = | 1 | x |
| - | 63327 2500 | = | 1 | x |
| - | 1 | x | = | 63327 2500 |
| - | x | = | 63327 2500 |
| - | 63327 2500 | = | x |
| x | = | - | 63327 2500 |