4 5 | + | ( | 1 | + | x | ) | ÷ | 10 | + | x | = | 54 500 |
| Left side of the equation = | 4 5 | + | 1 | × | 1 10 | + | x | × | 1 10 | + | x |
| = | 4 5 | + | 1 10 | + | x | × | 1 10 | + | x |
| = | 9 10 | + | 11 10 | x |
9 10 | + | 11 10 | x | = | 54 500 |
11 10 | x | = | 54 500 | − | 9 10 |
11 10 | x | = | - | 99 125 |
| x | = | - | 99 125 | ÷ | 11 10 |
| = | - | 99 125 | × | 10 11 |
| = | - | 9 25 | × | 2 |
| x | = | - | 18 25 |
| x | = | - 0.72 |