| ( | 5 | + | x | ) | ÷ | ( | 30 | + | x | ) | = | 3 50 |
| Multiply both sides of the equation by: | ( | 30 | + | x | ) |
| ( | 5 | + | x | ) | = | 3 50 | ( | 30 | + | x | ) |
| 5 | + | x | = | 3 50 | ( | 30 | + | x | ) |
| 5 | + | x | = | 3 50 | × | 30 | + | 3 50 | x |
| 5 | + | x | = | 9 5 | + | 3 50 | x |
| x | − | 3 50 | x | = | 9 5 | − | 5 |
47 50 | x | = | 9 5 | − | 5 |
47 50 | x | = | - | 16 5 |
| x | = | - | 16 5 | ÷ | 47 50 |
| = | - | 16 5 | × | 50 47 |
| = | - | 16 | × | 10 47 |
| x | = | - | 160 47 |
| x | = | - 3.404255 |