| ( | 1 | + | x | ) | x | ÷ | 2 | × | 109 2 | × | 13 400 | ÷ | 12 | = | 0 |
| Left side of the equation = | ( | 1 | + | x | ) | x | × | 1417 19200 |
| ( | 1 | + | x | ) | x | × | 1417 19200 | = | 0 |
| Left side of the equation = | 1 | x | × | 1417 19200 | + | x | x | × | 1417 19200 |
| = | 1417 19200 | x | + | x | x | × | 1417 19200 |
1417 19200 | x | + | x | x | × | 1417 19200 | = | 0 |