| ( | 4 | x | + | 301 | ) | ÷ | ( | 142 | + | x | ) | = | 13 5 |
| Multiply both sides of the equation by: | ( | 142 | + | x | ) |
| ( | 4 | x | + | 301 | ) | = | 13 5 | ( | 142 | + | x | ) |
| 4 | x | + | 301 | = | 13 5 | ( | 142 | + | x | ) |
| 4 | x | + | 301 | = | 13 5 | × | 142 | + | 13 5 | x |
| 4 | x | + | 301 | = | 1846 5 | + | 13 5 | x |
| 4 | x | − | 13 5 | x | = | 1846 5 | − | 301 |
7 5 | x | = | 1846 5 | − | 301 |
7 5 | x | = | 341 5 |
| x | = | 341 5 | ÷ | 7 5 |
| = | 341 5 | × | 5 7 |
| = | 341 | × | 1 7 |
| x | = | 341 7 |
| x | = | 48.714286 |