| 1 | ÷ | 80 | × | 2 | x | + | 1 | ÷ | 80 | + | 8 | ( | 5 | + | x | ) | = | 1 | × | 75 100 |
| Left side of the equation = | 1 40 | x | + | 1 80 | + | 8 | ( | 5 | + | x | ) |
1 40 | x | + | 1 80 | + | 8 | ( | 5 | + | x | ) | = | 1 | × | 75 100 |
| Left side of the equation = | 1 40 | x | + | 1 80 | + | 8 | × | 5 | + | 8 | x |
| = | 1 40 | x | + | 1 80 | + | 40 | + | 8 | x |
| = | 321 40 | x | + | 3201 80 |
321 40 | x | + | 3201 80 | = | 1 | × | 75 100 |
| Right side of the equation = | 3 4 |
321 40 | x | + | 3201 80 | = | 3 4 |
321 40 | x | = | 3 4 | − | 3201 80 |
321 40 | x | = | - | 3141 80 |
| x | = | - | 3141 80 | ÷ | 321 40 |
| = | - | 3141 80 | × | 40 321 |
| = | - | 1047 2 | × | 1 107 |
| x | = | - | 1047 214 |
| x | = | - 4.892523 |