| ( | 42309 1000 | + | x | ) | × | 39 20 | = | 36709 500 | − | x | + | 42309 1000 |
| Left side of the equation = | 42309 1000 | × | 39 20 | + | x | × | 39 20 |
| = | 1650051 20000 | + | x | × | 39 20 |
1650051 20000 | + | 39 20 | x | = | 36709 500 | − | x | + | 42309 1000 |
| Right side of the equation = | 115727 1000 | − | x |
1650051 20000 | + | 39 20 | x | = | 115727 1000 | − | x |
39 20 | x | + | x | = | 115727 1000 | − | 1650051 20000 |
59 20 | x | = | 115727 1000 | − | 1650051 20000 |
59 20 | x | = | 664489 20000 |
| x | = | 664489 20000 | ÷ | 59 20 |
| = | 664489 20000 | × | 20 59 |
| = | 664489 1000 | × | 1 59 |
| x | = | 664489 59000 |
| x | = | 11.262525 |