| b | ÷ | ( | 709 50 | − | b | ) | = | 71277 25 | ÷ | 372617 100 |
| 方程两边同时乘以: | ( | 709 50 | − | b | ) |
| b | = | 71277 25 | ÷ | 372617 100 | × | ( | 709 50 | − | b | ) |
| b | = | 71277 25 | ÷ | 372617 100 | × | 709 50 | − | 71277 25 | ÷ | 372617 100 | × | b |
| b | = | 101070786 9315425 | − | 285108 372617 | b |
| b | + | 285108 372617 | b | = | 101070786 9315425 |
657725 372617 | b | = | 101070786 9315425 |
| b | = | 101070786 9315425 | ÷ | 657725 372617 |
| = | 101070786 9315425 | × | 372617 657725 |
| = | 101070786 1330775 | × | 53231 657725 |
| b | = | 5380099009566 875283986875 |