13 100 | x | + | ( | x | × | 21 20 | + | 200 | ) | + | 3 20 | x | + | ( | 13 100 | x | × | 331 2000 | ) | = | 15000 |
| Left side of the equation = | 7 25 | x | + | ( | x | × | 21 20 | + | 200 | ) | + | ( | 13 100 | x | × | 331 2000 | ) |
7 25 | x | + | ( | x | × | 21 20 | + | 200 | ) | + | ( | 13 100 | x | × | 331 2000 | ) | = | 15000 |
| Left side of the equation = | 7 25 | x | + | x | × | 21 20 | + | 200 | + | ( | 13 100 | x | × | 331 2000 | ) |
| = | 133 100 | x | + | 200 | + | ( | 13 100 | x | × | 331 2000 | ) |
| = | 133 100 | x | + | 200 | + | 13 100 | x | × | 331 2000 |
| = | 133 100 | x | + | 200 | + | 4303 200000 | x |
| = | 270303 200000 | x | + | 200 |
270303 200000 | x | + | 200 | = | 15000 |
270303 200000 | x | = | 15000 | − | 200 |
270303 200000 | x | = | 14800 |
| x | = | 14800 | ÷ | 270303 200000 |
| = | 14800 | × | 200000 270303 |
| x | = | 2960000000 270303 |
| x | = | 10950.673873 |