| ( | 140 | − | x | ) | × | 8960 | + | 1350000 | + | ( | 140 | − | x | ) | × | 9000 | = | 1350000 | + | ( | 140 | + | x | ) | × | 9000 |
| Left side of the equation = | 140 | × | 8960 | − | x | × | 8960 | + | 1350000 | + | ( | 140 | − | x | ) | × | 9000 |
| = | 1254400 | − | x | × | 8960 | + | 1350000 | + | ( | 140 | − | x | ) | × | 9000 |
| = | 2604400 | − | 8960 | x | + | ( | 140 | − | x | ) | × | 9000 |
| = | 2604400 | − | 8960 | x | + | 140 | × | 9000 | − | x | × | 9000 |
| = | 2604400 | − | 8960 | x | + | 1260000 | − | x | × | 9000 |
| = | 3864400 | − | 17960 | x |
| 3864400 | − | 17960 | x | = | 1350000 | + | ( | 140 | + | x | ) | × | 9000 |
| Right side of the equation = | 1350000 | + | 140 | × | 9000 | + | x | × | 9000 |
| = | 1350000 | + | 1260000 | + | x | × | 9000 |
| = | 2610000 | + | 9000 | x |
| 3864400 | − | 17960 | x | = | 2610000 | + | 9000 | x |
| - | 17960 | x | − | 9000 | x | = | 2610000 | − | 3864400 |
| - | 26960 | x | = | 2610000 | − | 3864400 |
| - | 26960 | x | = | - | 1254400 |
| 1254400 | = | 26960 | x |
| 26960 | x | = | 1254400 |
| x | = | 1254400 | ÷ | 26960 |
| = | 1254400 | × | 1 26960 |
| = | 15680 | × | 1 337 |
| x | = | 15680 337 |
| x | = | 46.52819 |