| 500000 | x | − | 5 | × | 500000 | = | 3000000 | + | 80 | × | 500000 |
| Left side of the equation = | 500000 | x | − | 2500000 |
| 500000 | x | − | 2500000 | = | 3000000 | + | 80 | × | 500000 |
| Right side of the equation = | 3000000 | + | 40000000 |
| = | 43000000 |
| 500000 | x | − | 2500000 | = | 43000000 |
| 500000 | x | = | 43000000 | + | 2500000 |
| 500000 | x | = | 45500000 |
| x | = | 45500000 | ÷ | 500000 |
| = | 45500000 | × | 1 500000 |
| = | 91 | × | 1 |
| x | = | 91 |