85899 20 | = | 112 5 | × | 1000 | × | 12 5 | x | ( | 7 5 | − | 31 200 | − | x | ÷ | 2 | ) |
| Right side of the equation = | 53760 | x | ( | 7 5 | − | 31 200 | − | x | ÷ | 2 | ) |
85899 20 | = | 53760 | x | ( | 7 5 | − | 31 200 | − | x | ÷ | 2 | ) |
| Right side of the equation = | 53760 | x | × | 7 5 | − | 53760 | x | × | 31 200 | − | 53760 | x | x | ÷ | 2 |
| = | 75264 | x | − | 41664 5 | x | − | 26880 | x | x |
| = | 334656 5 | x | − | 26880 | x | x |
85899 20 | = | 334656 5 | x | − | 26880 | x | x |