| 1187000000 | = | 69 5 | × | 2100 | y | ( | 1350 | − | 1 2 | y | ) |
| Right side of the equation = | 28980 | y | ( | 1350 | − | 1 2 | y | ) |
| 1187000000 | = | 28980 | y | ( | 1350 | − | 1 2 | y | ) |
| Right side of the equation = | 28980 | y | × | 1350 | − | 28980 | y | × | 1 2 | y |
| = | 39123000 | y | − | 14490 | y | y |
| 1187000000 | = | 39123000 | y | − | 14490 | y | y |