| ( | 587 | + | x | ) | × | 3 4 | × | 1 | × | 31 20 | = | 8700 | ÷ | 5 |
| 方程左边 = | ( | 587 | + | x | ) | × | 93 80 |
| ( | 587 | + | x | ) | × | 93 80 | = | 8700 | ÷ | 5 |
| 方程左边 = | 587 | × | 93 80 | + | x | × | 93 80 |
| = | 54591 80 | + | x | × | 93 80 |
54591 80 | + | 93 80 | x | = | 8700 | ÷ | 5 |
| 方程右边 = | 1740 |
54591 80 | + | 93 80 | x | = | 1740 |
93 80 | x | = | 1740 | − | 54591 80 |
93 80 | x | = | 84609 80 |
| x | = | 84609 80 | ÷ | 93 80 |
| = | 84609 80 | × | 80 93 |
| = | 28203 | × | 1 31 |
| x | = | 28203 31 |
| x | = | 909.774194 |