| ( | 10 | + | 2 | t | ) | − | ( | 8 | + | t | ) | = | ( | 2 | + | 4 | t | ) | − | ( | 10 | + | 2 | t | ) |
| Left side of the equation = | 10 | + | 2 | t | − | ( | 8 | + | t | ) |
| = | 10 | + | 2 | t | − | 8 | − | t |
| = | 2 | + | 1 | t |
| 2 | + | 1 | t | = | ( | 2 | + | 4 | t | ) | − | ( | 10 | + | 2 | t | ) |
| Right side of the equation = | 2 | + | 4 | t | − | ( | 10 | + | 2 | t | ) |
| = | 2 | + | 4 | t | − | 10 | − | 2 | t |
| = | - | 8 | + | 2 | t |
| 2 | + | 1 | t | = | - | 8 | + | 2 | t |
| 1 | t | − | 2 | t | = | - | 8 | − | 2 |
| - | t | = | - | 8 | − | 2 |
| - | t | = | - | 8 | − | 2 |
| - | t | = | - | 10 |
| 10 | = | t |
| t | = | 10 |