| ( | x | + | ( | x | × | 3 20 | ) | ) | × | 3 50 | + | x | + | ( | x | × | 3 20 | ) | = | 8533 |
| Left side of the equation = | x | × | 3 50 | + | ( | x | × | 3 20 | ) | × | 3 50 | + | x | + | ( | x | × | 3 20 | ) |
| = | 53 50 | x | + | ( | x | × | 3 20 | ) | × | 3 50 | + | ( | x | × | 3 20 | ) |
| = | 53 50 | x | + | x | × | 3 20 | × | 3 50 | + | ( | x | × | 3 20 | ) |
| = | 53 50 | x | + | x | × | 9 1000 | + | ( | x | × | 3 20 | ) |
| = | 1069 1000 | x | + | ( | x | × | 3 20 | ) |
| = | 1069 1000 | x | + | x | × | 3 20 |
| = | 1219 1000 | x |
1219 1000 | x | = | 8533 |
| x | = | 8533 | ÷ | 1219 1000 |
| = | 8533 | × | 1000 1219 |
| = | 7 | × | 1000 |
| x | = | 7000 |