| 400 | ( | x | − | 1 4 | ) | + | 96 | = | 1200 | × | 1 10 | × | 43 50 |
| Left side of the equation = | 400 | x | − | 400 | × | 1 4 | + | 96 |
| = | 400 | x | − | 100 | + | 96 |
| = | 400 | x | − | 4 |
| 400 | x | − | 4 | = | 1200 | × | 1 10 | × | 43 50 |
| Right side of the equation = | 516 5 |
| 400 | x | − | 4 | = | 516 5 |
| 400 | x | = | 516 5 | + | 4 |
| 400 | x | = | 536 5 |
| x | = | 536 5 | ÷ | 400 |
| = | 536 5 | × | 1 400 |
| = | 67 5 | × | 1 50 |
| x | = | 67 250 |
| x | = | 0.268 |