| ( | 42309 1000 | + | x | ) | × | 31 20 | = | 42309 1000 | + | 14079 200 | − | x |
| Left side of the equation = | 42309 1000 | × | 31 20 | + | x | × | 31 20 |
| = | 1311579 20000 | + | x | × | 31 20 |
1311579 20000 | + | 31 20 | x | = | 42309 1000 | + | 14079 200 | − | x |
| Right side of the equation = | 14088 125 | − | x |
1311579 20000 | + | 31 20 | x | = | 14088 125 | − | x |
31 20 | x | + | x | = | 14088 125 | − | 1311579 20000 |
51 20 | x | = | 14088 125 | − | 1311579 20000 |
51 20 | x | = | 942501 20000 |
| x | = | 942501 20000 | ÷ | 51 20 |
| = | 942501 20000 | × | 20 51 |
| = | 314167 1000 | × | 1 17 |
| x | = | 314167 17000 |
| x | = | 18.480412 |