| 42000 | × | 23 5 | ( | t | − | 48 | ) | = | 460 | × | 10 | ( | 100 | − | t | ) |
| Left side of the equation = | 193200 | ( | t | − | 48 | ) |
| 193200 | ( | t | − | 48 | ) | = | 460 | × | 10 | ( | 100 | − | t | ) |
| Left side of the equation = | 193200 | t | − | 193200 | × | 48 |
| = | 193200 | t | − | 9273600 |
| 193200 | t | − | 9273600 | = | 460 | × | 10 | ( | 100 | − | t | ) |
| Right side of the equation = | 4600 | ( | 100 | − | t | ) |
| 193200 | t | − | 9273600 | = | 4600 | ( | 100 | − | t | ) |
| Right side of the equation = | 4600 | × | 100 | − | 4600 | t |
| = | 460000 | − | 4600 | t |
| 193200 | t | − | 9273600 | = | 460000 | − | 4600 | t |
| 193200 | t | + | 4600 | t | = | 460000 | + | 9273600 |
| 197800 | t | = | 460000 | + | 9273600 |
| 197800 | t | = | 9733600 |
| t | = | 9733600 | ÷ | 197800 |
| = | 9733600 | × | 1 197800 |
| = | 2116 | × | 1 43 |
| t | = | 2116 43 |
| t | = | 49.209302 |