22 25 | x | = | 500 | × | 9 10 | + | 4 5 | ( | x | − | 500 | ) |
| Right side of the equation = | 450 | + | 4 5 | ( | x | − | 500 | ) |
22 25 | x | = | 450 | + | 4 5 | ( | x | − | 500 | ) |
| Right side of the equation = | 450 | + | 4 5 | x | − | 4 5 | × | 500 |
| = | 450 | + | 4 5 | x | − | 400 |
| = | 50 | + | 4 5 | x |
22 25 | x | = | 50 | + | 4 5 | x |
22 25 | x | − | 4 5 | x | = | 50 |
2 25 | x | = | 50 |
| x | = | 50 | ÷ | 2 25 |
| = | 50 | × | 25 2 |
| = | 25 | × | 25 |
| x | = | 625 |