| ( | 10 | + | x | ) | ÷ | 2 | = | ( | 10 | + | 10 | + | x | ) | ÷ | 4 |
| Left side of the equation = | 10 | × | 1 2 | + | x | × | 1 2 |
| = | 5 | + | x | × | 1 2 |
| 5 | + | 1 2 | x | = | ( | 10 | + | 10 | + | x | ) | ÷ | 4 |
| Right side of the equation = | 10 | × | 1 4 | + | 10 | × | 1 4 | + | x | × | 1 4 |
| = | 5 2 | + | 5 2 | + | x | × | 1 4 |
| = | 5 | + | 1 4 | x |
| 5 | + | 1 2 | x | = | 5 | + | 1 4 | x |
1 2 | x | − | 1 4 | x | = | 5 | − | 5 |
1 4 | x | = | 5 | − | 5 |
1 4 | x | = | 0 |
| x | = | 0 | ÷ | 1 4 |
| = | 0 | × | 4 |
| x | = | 0 |