| ( | 41789 1000 | + | x | ) | × | 31 20 | = | 8781 125 | + | 41789 1000 | − | x |
| Left side of the equation = | 41789 1000 | × | 31 20 | + | x | × | 31 20 |
| = | 1295459 20000 | + | x | × | 31 20 |
1295459 20000 | + | 31 20 | x | = | 8781 125 | + | 41789 1000 | − | x |
| Right side of the equation = | 112037 1000 | − | x |
1295459 20000 | + | 31 20 | x | = | 112037 1000 | − | x |
31 20 | x | + | x | = | 112037 1000 | − | 1295459 20000 |
51 20 | x | = | 112037 1000 | − | 1295459 20000 |
51 20 | x | = | 945281 20000 |
| x | = | 945281 20000 | ÷ | 51 20 |
| = | 945281 20000 | × | 20 51 |
| = | 945281 1000 | × | 1 51 |
| x | = | 945281 51000 |
| x | = | 18.534922 |