| x | ÷ | 72 | × | 1000 | = | 6 | ( | 5 | + | x | ÷ | 72 | ÷ | 21 20 | ) |
| Left side of the equation = | x | × | 125 9 |
125 9 | x | = | 6 | ( | 5 | + | x | ÷ | 72 | ÷ | 21 20 | ) |
| Right side of the equation = | 6 | × | 5 | + | 6 | x | ÷ | 72 | ÷ | 21 20 |
| = | 30 | + | 5 63 | x |
125 9 | x | = | 30 | + | 5 63 | x |
125 9 | x | − | 5 63 | x | = | 30 |
290 21 | x | = | 30 |
| x | = | 30 | ÷ | 290 21 |
| = | 30 | × | 21 290 |
| = | 3 | × | 21 29 |
| x | = | 63 29 |
| x | = | 2.172414 |