1311 100 | x | = | 399 50 | ( | 7 2 | + | x | ) |
| Right side of the equation = | 399 50 | × | 7 2 | + | 399 50 | x |
| = | 2793 100 | + | 399 50 | x |
1311 100 | x | = | 2793 100 | + | 399 50 | x |
1311 100 | x | − | 399 50 | x | = | 2793 100 |
513 100 | x | = | 2793 100 |
| x | = | 2793 100 | ÷ | 513 100 |
| = | 2793 100 | × | 100 513 |
| = | 931 | × | 1 171 |
| x | = | 931 171 |
| x | = | 49 9 |
| x | = | 5.444444 |