| ( | x | − | 8 100 | ) | ÷ | 30 | = | ( | 10 100 | − | x | ) | ÷ | 360 |
| Left side of the equation = | x | × | 1 30 | − | 8 100 | × | 1 30 |
| = | x | × | 1 30 | − | 1 375 |
1 30 | x | − | 1 375 | = | ( | 10 100 | − | x | ) | ÷ | 360 |
| Right side of the equation = | 10 100 | × | 1 360 | − | x | × | 1 360 |
| = | 1 3600 | − | x | × | 1 360 |
1 30 | x | − | 1 375 | = | 1 3600 | − | 1 360 | x |
1 30 | x | + | 1 360 | x | = | 1 3600 | + | 1 375 |
13 360 | x | = | 1 3600 | + | 1 375 |
13 360 | x | = | 53 18000 |
| x | = | 53 18000 | ÷ | 13 360 |
| = | 53 18000 | × | 360 13 |
| = | 53 50 | × | 1 13 |
| x | = | 53 650 |
| x | = | 0.081538 |