| ( | 198 | ( | 1 | + | 28 100 | ) | ) | + | ( | 7 100 | x | ) | = | x |
| Left side of the equation = | 198 | ( | 1 | + | 28 100 | ) | + | ( | 7 100 | x | ) |
| = | 198 | × | 1 | + | 198 | × | 28 100 | + | ( | 7 100 | x | ) |
| = | 198 | + | 1386 25 | + | ( | 7 100 | x | ) |
| = | 6336 25 | + | ( | 7 100 | x | ) |
| = | 6336 25 | + | 7 100 | x |
6336 25 | + | 7 100 | x | = | x |
7 100 | x | − | x | = | - | 6336 25 |
| - | 93 100 | x | = | - | 6336 25 |
6336 25 | = | 93 100 | x |
93 100 | x | = | 6336 25 |
| x | = | 6336 25 | ÷ | 93 100 |
| = | 6336 25 | × | 100 93 |
| = | 2112 | × | 4 31 |
| x | = | 8448 31 |
| x | = | 272.516129 |