| ( | 4 | ÷ | 1000 | ) | + | ( | 10 | ÷ | 3600 | ) | x | = | ( | 12 | ÷ | 1000 | ) | + | ( | 10 | ÷ | 3600 | ) | x |
| Left side of the equation = | 4 | ÷ | 1000 | + | ( | 10 | ÷ | 3600 | ) | x |
| = | 1 250 | + | ( | 10 | ÷ | 3600 | ) | x |
| = | 1 250 | + | 10 | ÷ | 3600 | × | x |
| = | 1 250 | + | 1 360 | x |
1 250 | + | 1 360 | x | = | ( | 12 | ÷ | 1000 | ) | + | ( | 10 | ÷ | 3600 | ) | x |
| Right side of the equation = | 12 | ÷ | 1000 | + | ( | 10 | ÷ | 3600 | ) | x |
| = | 3 250 | + | ( | 10 | ÷ | 3600 | ) | x |
| = | 3 250 | + | 10 | ÷ | 3600 | × | x |
| = | 3 250 | + | 1 360 | x |
1 250 | + | 1 360 | x | = | 3 250 | + | 1 360 | x |
1 360 | x | − | 1 360 | x | = | 3 250 | − | 1 250 |
| 0 | x | = | 3 250 | − | 1 250 |
| 0 | x | = | 1 125 |