| x | ÷ | ( | ( | 4919 2500 | − | x | ) | × | 3 10 | ) | = | 71 100 |
| 方程两边同时乘以: | ( | ( | 4919 2500 | − | x | ) | × | 3 10 | ) |
| x | = | 71 100 | ( | ( | 4919 2500 | − | x | ) | × | 3 10 | ) |
| x | = | 71 100 | ( | 4919 2500 | − | x | ) | × | 3 10 |
| x | = | 213 1000 | ( | 4919 2500 | − | x | ) |
| x | = | 213 1000 | × | 4919 2500 | − | 213 1000 | x |
| x | = | 1047747 2500000 | − | 213 1000 | x |
| x | + | 213 1000 | x | = | 1047747 2500000 |
1213 1000 | x | = | 1047747 2500000 |
| x | = | 1047747 2500000 | ÷ | 1213 1000 |
| = | 1047747 2500000 | × | 1000 1213 |
| = | 1047747 2500 | × | 1 1213 |
| x | = | 1047747 3032500 |
| x | = | 0.345506 |