| ( | 14 | ) | ( | x | + | 800 | ) | + | ( | 14 | ) | ( | x | + | 500 | ) | + | 7 | x | ÷ | 12 | + | 18 | x | ÷ | 12 | + | 108 | x | = | 407880 | − | 24100 |
| Left side of the equation = | ( | 14 | ) | ( | x | + | 800 | ) | + | ( | 14 | ) | ( | x | + | 500 | ) | + | 7 12 | x | + | 3 2 | x | + | 108 | x |
| = | ( | 14 | ) | ( | x | + | 800 | ) | + | ( | 14 | ) | ( | x | + | 500 | ) | + | 1321 12 | x |
| ( | 14 | ) | ( | x | + | 800 | ) | + | ( | 14 | ) | ( | x | + | 500 | ) | + | 1321 12 | x | = | 407880 | − | 24100 |
| Left side of the equation = | 14 | ( | x | + | 800 | ) | + | ( | 14 | ) | ( | x | + | 500 | ) | + | 1321 12 | x |
| = | 14 | x | + | 14 | × | 800 | + | ( | 14 | ) | ( | x | + | 500 | ) | + | 1321 12 | x |
| = | 14 | x | + | 11200 | + | ( | 14 | ) | ( | x | + | 500 | ) | + | 1321 12 | x |
| = | 1489 12 | x | + | 11200 | + | ( | 14 | ) | ( | x | + | 500 | ) |
| = | 1489 12 | x | + | 11200 | + | 14 | ( | x | + | 500 | ) |
| = | 1489 12 | x | + | 11200 | + | 14 | x | + | 14 | × | 500 |
| = | 1489 12 | x | + | 11200 | + | 14 | x | + | 7000 |
| = | 1657 12 | x | + | 18200 |
1657 12 | x | + | 18200 | = | 407880 | − | 24100 |
| Right side of the equation = | 383780 |
1657 12 | x | + | 18200 | = | 383780 |
1657 12 | x | = | 383780 | − | 18200 |
1657 12 | x | = | 365580 |
| x | = | 365580 | ÷ | 1657 12 |
| = | 365580 | × | 12 1657 |
| x | = | 4386960 1657 |
| x | = | 2647.531684 |