3 20 | x | + | 11 200 | ( | 1 | − | x | ) | = | 3 25 |
| Left side of the equation = | 3 20 | x | + | 11 200 | × | 1 | − | 11 200 | x |
| = | 3 20 | x | + | 11 200 | − | 11 200 | x |
| = | 19 200 | x | + | 11 200 |
19 200 | x | + | 11 200 | = | 3 25 |
19 200 | x | = | 3 25 | − | 11 200 |
19 200 | x | = | 13 200 |
| x | = | 13 200 | ÷ | 19 200 |
| = | 13 200 | × | 200 19 |
| = | 13 | × | 1 19 |
| x | = | 13 19 |
| x | = | 0.684211 |