| ( | 9980 | + | 70 | + | x | ) | × | 16 500 | = | 4 | x |
| Left side of the equation = | 9980 | × | 16 500 | + | 70 | × | 16 500 | + | x | × | 16 500 |
| = | 7984 25 | + | 56 25 | + | x | × | 16 500 |
| = | 1608 5 | + | 16 500 | x |
1608 5 | + | 16 500 | x | = | 4 | x |
16 500 | x | − | 4 | x | = | - | 1608 5 |
| - | 496 125 | x | = | - | 1608 5 |
1608 5 | = | 496 125 | x |
496 125 | x | = | 1608 5 |
| x | = | 1608 5 | ÷ | 496 125 |
| = | 1608 5 | × | 125 496 |
| = | 201 | × | 25 62 |
| x | = | 5025 62 |
| x | = | 81.048387 |