| 10000 | ( | 9 500 | + | 21 500 | ) | = | 1250 | ( | 9 500 | + | x | ) |
| Left side of the equation = | 10000 | × | 9 500 | + | 10000 | × | 21 500 |
| = | 180 | + | 420 |
| = | 600 |
| 600 | = | 1250 | ( | 9 500 | + | x | ) |
| Right side of the equation = | 1250 | × | 9 500 | + | 1250 | x |
| = | 45 2 | + | 1250 | x |
| 600 | = | 45 2 | + | 1250 | x |
| - | 1250 | x | = | 45 2 | − | 600 |
| - | 1250 | x | = | - | 1155 2 |
1155 2 | = | 1250 | x |
| 1250 | x | = | 1155 2 |
| x | = | 1155 2 | ÷ | 1250 |
| = | 1155 2 | × | 1 1250 |
| = | 231 2 | × | 1 250 |
| x | = | 231 500 |
| x | = | 0.462 |