| ( | 16603 2 | + | 207 20 | + | 65 | + | X | ) | × | 7 200 | × | 1 | ÷ | 4 | = | X |
| Left side of the equation = | ( | 16603 2 | + | 207 20 | + | 65 | + | X | ) | × | 7 800 |
| ( | 16603 2 | + | 207 20 | + | 65 | + | X | ) | × | 7 800 | = | X |
| Left side of the equation = | 16603 2 | × | 7 800 | + | 207 20 | × | 7 800 | + | 65 | × | 7 800 | + | X | × | 7 800 |
| = | 116221 1600 | + | 1449 16000 | + | 91 160 | + | X | × | 7 800 |
| = | 1172759 16000 | + | 7 800 | X |
1172759 16000 | + | 7 800 | X | = | X |
7 800 | X | − | X | = | - | 1172759 16000 |
| - | 793 800 | X | = | - | 1172759 16000 |
1172759 16000 | = | 793 800 | X |
793 800 | X | = | 1172759 16000 |
| X | = | 1172759 16000 | ÷ | 793 800 |
| = | 1172759 16000 | × | 800 793 |
| = | 1172759 20 | × | 1 793 |
| X | = | 1172759 15860 |
| X | = | 73.944451 |