| ( | 3 4 | x | − | 405 2 | ) | ÷ | 9100 | = | ( | 3 4 | x | − | 225 2 | ) | ÷ | 9200 |
| Left side of the equation = | 3 4 | x | × | 1 9100 | − | 405 2 | × | 1 9100 |
| = | 3 36400 | x | − | 81 3640 |
3 36400 | x | − | 81 3640 | = | ( | 3 4 | x | − | 225 2 | ) | ÷ | 9200 |
| Right side of the equation = | 3 4 | x | × | 1 9200 | − | 225 2 | × | 1 9200 |
| = | 3 36800 | x | − | 9 736 |
3 36400 | x | − | 81 3640 | = | 3 36800 | x | − | 9 736 |
3 36400 | x | − | 3 36800 | x | = | - | 9 736 | + | 81 3640 |
3 3348800 | x | = | - | 9 736 | + | 81 3640 |
3 3348800 | x | = | 3357 334880 |
| x | = | 3357 334880 | ÷ | 3 3348800 |
| = | 3357 334880 | × | 3348800 3 |
| = | 1119 | × | 10 |
| x | = | 11190 |