| ( | 1 | + | x | ) | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) | = | x | × | 12000 | x | ( | 13 400 | ÷ | 12 | ) |
| Left side of the equation = | 1 | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) | + | x | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) |
| = | 109 2 | ( | x | ÷ | 2 | ) | ( | 13 400 | ÷ | 12 | ) | + | x | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) |
| = | 109 2 | x | ÷ | 2 | × | ( | 13 400 | ÷ | 12 | ) | + | x | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) |
| = | 109 4 | x | ( | 13 400 | ÷ | 12 | ) | + | x | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) |
| = | 109 4 | x | × | 13 400 | ÷ | 12 | + | x | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) |
| = | 1417 19200 | x | + | x | ( | x | ÷ | 2 | ) | × | 109 2 | ( | 13 400 | ÷ | 12 | ) |
| = | 1417 19200 | x | + | x | x | ÷ | 2 | × | 109 2 | ( | 13 400 | ÷ | 12 | ) |
| = | 1417 19200 | x | + | x | x | × | 109 4 | ( | 13 400 | ÷ | 12 | ) |
| = | 1417 19200 | x | + | x | x | × | 109 4 | × | 13 400 | ÷ | 12 |
| = | 1417 19200 | x | + | x | x | × | 1417 19200 |
1417 19200 | x | + | x | x | × | 1417 19200 | = | x | × | 12000 | x | ( | 13 400 | ÷ | 12 | ) |
| Right side of the equation = | x | × | 12000 | x | × | 13 400 | ÷ | 12 |
| = | x | × | 65 2 | x |
1417 19200 | x | + | x | x | × | 1417 19200 | = | x | × | 65 2 | x |