| ( | 12813 500 | + | x | ) | × | 51 20 | = | 51253 1000 | + | 71679 1000 | − | x |
| Left side of the equation = | 12813 500 | × | 51 20 | + | x | × | 51 20 |
| = | 653463 10000 | + | x | × | 51 20 |
653463 10000 | + | 51 20 | x | = | 51253 1000 | + | 71679 1000 | − | x |
| Right side of the equation = | 30733 250 | − | x |
653463 10000 | + | 51 20 | x | = | 30733 250 | − | x |
51 20 | x | + | x | = | 30733 250 | − | 653463 10000 |
71 20 | x | = | 30733 250 | − | 653463 10000 |
71 20 | x | = | 575857 10000 |
| x | = | 575857 10000 | ÷ | 71 20 |
| = | 575857 10000 | × | 20 71 |
| = | 575857 500 | × | 1 71 |
| x | = | 575857 35500 |
| x | = | 16.221324 |