| ( | 3 1000 | + | x | ) | ÷ | ( | 3 500 | + | x | ) | = | 157 250 |
| 方程两边同时乘以: | ( | 3 500 | + | x | ) |
| ( | 3 1000 | + | x | ) | = | 157 250 | ( | 3 500 | + | x | ) |
3 1000 | + | x | = | 157 250 | ( | 3 500 | + | x | ) |
3 1000 | + | x | = | 157 250 | × | 3 500 | + | 157 250 | x |
3 1000 | + | x | = | 471 125000 | + | 157 250 | x |
| x | − | 157 250 | x | = | 471 125000 | − | 3 1000 |
93 250 | x | = | 471 125000 | − | 3 1000 |
93 250 | x | = | 12 15625 |
| x | = | 12 15625 | ÷ | 93 250 |
| = | 12 15625 | × | 250 93 |
| = | 4 125 | × | 2 31 |
| x | = | 8 3875 |
| x | = | 0.002065 |