| ( | 118 | ( | 1 | + | 20 100 | ) | ) | + | ( | 4 100 | x | ) | = | x |
| Left side of the equation = | 118 | ( | 1 | + | 20 100 | ) | + | ( | 4 100 | x | ) |
| = | 118 | × | 1 | + | 118 | × | 20 100 | + | ( | 4 100 | x | ) |
| = | 118 | + | 118 5 | + | ( | 4 100 | x | ) |
| = | 708 5 | + | ( | 4 100 | x | ) |
| = | 708 5 | + | 4 100 | x |
708 5 | + | 4 100 | x | = | x |
4 100 | x | − | x | = | - | 708 5 |
| - | 24 25 | x | = | - | 708 5 |
708 5 | = | 24 25 | x |
24 25 | x | = | 708 5 |
| x | = | 708 5 | ÷ | 24 25 |
| = | 708 5 | × | 25 24 |
| = | 59 | × | 5 2 |
| x | = | 295 2 |
| x | = | 147.5 |