| ( | 61 100 | + | x | + | 61 100 | × | 2 5 | + | 61 100 | × | 7 50 | ) | × | 84 | = | 57981 25 | − | 67 100 |
| 方程左边 = | 61 100 | × | 84 | + | x | × | 84 | + | 61 100 | × | 2 5 | × | 84 | + | 61 100 | × | 7 50 | × | 84 |
| = | 1281 25 | + | x | × | 84 | + | 2562 125 | + | 8967 1250 |
| = | 98637 1250 | + | 84 | x |
98637 1250 | + | 84 | x | = | 57981 25 | − | 67 100 |
| 方程右边 = | 231857 100 |
98637 1250 | + | 84 | x | = | 231857 100 |
| 84 | x | = | 231857 100 | − | 98637 1250 |
| 84 | x | = | 5599151 2500 |
| x | = | 5599151 2500 | ÷ | 84 |
| = | 5599151 2500 | × | 1 84 |
| x | = | 5599151 210000 |
| x | = | 26.662624 |