| ( | ( | ( | P | − | 10 | ) | × | 100000 | − | 960000 | ) | × | 3 4 | ) | ÷ | P | × | 100000 | = | 81 500 |
| Multiply both sides of the equation by: | P |
| ( | ( | ( | P | − | 10 | ) | × | 100000 | − | 960000 | ) | × | 3 4 | ) | × | 100000 | = | 81 500 | P |
| ( | ( | P | − | 10 | ) | × | 100000 | − | 960000 | ) | × | 3 4 | × | 100000 | = | 81 500 | P |
| ( | ( | P | − | 10 | ) | × | 100000 | − | 960000 | ) | × | 75000 | = | 81 500 | P |
| ( | P | − | 10 | ) | × | 100000 | × | 75000 | − | 960000 | × | 75000 | = | 81 500 | P |