| ( | ( | x | × | 3 5 | ) | × | 39 50 | + | ( | x | × | 2 5 | ) | − | 5000 | ) | × | 9 10 | + | 5000 | = | 12000 |
| Left side of the equation = | ( | x | × | 3 5 | ) | × | 39 50 | × | 9 10 | + | ( | x | × | 2 5 | ) | × | 9 10 | − | 5000 | × | 9 10 | + | 5000 |
| = | ( | x | × | 3 5 | ) | × | 351 500 | + | ( | x | × | 2 5 | ) | × | 9 10 | − | 4500 | + | 5000 |
| = | ( | x | × | 3 5 | ) | × | 351 500 | + | ( | x | × | 2 5 | ) | × | 9 10 | + | 500 |
| = | x | × | 3 5 | × | 351 500 | + | ( | x | × | 2 5 | ) | × | 9 10 | + | 500 |
| = | x | × | 1053 2500 | + | ( | x | × | 2 5 | ) | × | 9 10 | + | 500 |
| = | 1053 2500 | x | + | x | × | 2 5 | × | 9 10 | + | 500 |
| = | 1053 2500 | x | + | x | × | 9 25 | + | 500 |
| = | 1953 2500 | x | + | 500 |
1953 2500 | x | + | 500 | = | 12000 |
1953 2500 | x | = | 12000 | − | 500 |
1953 2500 | x | = | 11500 |
| x | = | 11500 | ÷ | 1953 2500 |
| = | 11500 | × | 2500 1953 |
| x | = | 28750000 1953 |
| x | = | 14720.94214 |