89 125 | = | X | ÷ | 78 | ÷ | ( | X | ÷ | 78 | + | ( | 1 | − | X | ) | ÷ | 92 | ) |
| 方程两边同时乘以: | ( | X | ÷ | 78 | + | ( | 1 | − | X | ) | ÷ | 92 | ) |
89 125 | ( | X | ÷ | 78 | + | ( | 1 | − | X | ) | ÷ | 92 | ) | = | X | ÷ | 78 |
89 125 | X | ÷ | 78 | + | 89 125 | ( | 1 | − | X | ) | ÷ | 92 | = | X | ÷ | 78 |
89 9750 | X | + | 89 11500 | ( | 1 | − | X | ) | = | X | × | 1 78 |
89 9750 | X | + | 89 11500 | × | 1 | − | 89 11500 | X | = | 1 78 | X |
89 9750 | X | + | 89 11500 | − | 89 11500 | X | = | 1 78 | X |
623 448500 | X | + | 89 11500 | = | 1 78 | X |
623 448500 | X | − | 1 78 | X | = | - | 89 11500 |
| - | 1709 149500 | X | = | - | 89 11500 |
89 11500 | = | 1709 149500 | X |
1709 149500 | X | = | 89 11500 |
| X | = | 89 11500 | ÷ | 1709 149500 |
| = | 89 11500 | × | 149500 1709 |
| = | 89 | × | 13 1709 |
| X | = | 1157 1709 |
| X | = | 0.677004 |