| 2100000000 | = | 69 5 | × | 1600 | x | ( | 1174 | − | x | ÷ | 2 | ) |
| Right side of the equation = | 22080 | x | ( | 1174 | − | x | ÷ | 2 | ) |
| 2100000000 | = | 22080 | x | ( | 1174 | − | x | ÷ | 2 | ) |
| Right side of the equation = | 22080 | x | × | 1174 | − | 22080 | x | x | ÷ | 2 |
| = | 25921920 | x | − | 11040 | x | x |
| 2100000000 | = | 25921920 | x | − | 11040 | x | x |