| 2000 | × | 50000 | = | x | + | 1000 | × | 50000 | + | 150 | × | 50000 |
| Left side of the equation = | 100000000 |
| 100000000 | = | x | + | 1000 | × | 50000 | + | 150 | × | 50000 |
| Right side of the equation = | x | + | 50000000 | + | 7500000 |
| = | x | + | 57500000 |
| 100000000 | = | x | + | 57500000 |
| - | x | = | 57500000 | − | 100000000 |
| - | x | = | - | 42500000 |
| 42500000 | = | x |
| x | = | 42500000 |