| ( | 29 100 | ÷ | ( | 350 | + | x | ) | ) | x | = | 7 50 |
29 100 | ÷ | ( | 350 | + | x | ) | × | x | = | 7 50 |
| 方程两边同时乘以: | ( | 350 | + | x | ) |
29 100 | x | = | 7 50 | ( | 350 | + | x | ) |
29 100 | x | = | 7 50 | × | 350 | + | 7 50 | x |
29 100 | x | = | 49 | + | 7 50 | x |
29 100 | x | − | 7 50 | x | = | 49 |
3 20 | x | = | 49 |
| x | = | 49 | ÷ | 3 20 |
| = | 49 | × | 20 3 |
| x | = | 980 3 |
| x | = | 326.666667 |