| x | ÷ | 620 | = | ( | 1000 | − | x | ) | ÷ | 580 | + | 7 5 |
| Right side of the equation = | 1000 | × | 1 580 | − | x | × | 1 580 | + | 7 5 |
| = | 50 29 | − | x | × | 1 580 | + | 7 5 |
| = | 453 145 | − | 1 580 | x |
1 620 | x | = | 453 145 | − | 1 580 | x |
1 620 | x | + | 1 580 | x | = | 453 145 |
3 899 | x | = | 453 145 |
| x | = | 453 145 | ÷ | 3 899 |
| = | 453 145 | × | 899 3 |
| = | 151 145 | × | 899 |
| x | = | 135749 145 |
| x | = | 4681 5 |
| x | = | 936.2 |