| x | ÷ | 570 | = | ( | 800 | − | x | ) | ÷ | 630 | + | 100 | ÷ | 620 |
| Right side of the equation = | ( | 800 | − | x | ) | × | 1 630 | + | 5 31 |
1 570 | x | = | ( | 800 | − | x | ) | × | 1 630 | + | 5 31 |
| Right side of the equation = | 800 | × | 1 630 | − | x | × | 1 630 | + | 5 31 |
| = | 80 63 | − | x | × | 1 630 | + | 5 31 |
| = | 2795 1953 | − | 1 630 | x |
1 570 | x | = | 2795 1953 | − | 1 630 | x |
1 570 | x | + | 1 630 | x | = | 2795 1953 |
4 1197 | x | = | 2795 1953 |
| x | = | 2795 1953 | ÷ | 4 1197 |
| = | 2795 1953 | × | 1197 4 |
| = | 2795 31 | × | 19 4 |
| x | = | 53105 124 |
| x | = | 428.266129 |