| 135 | × | 450 | + | 150 | x | = | 320 | ( | 150 | x | ) |
| Left side of the equation = | 60750 | + | 150 | x |
| 60750 | + | 150 | x | = | 320 | ( | 150 | x | ) |
| Right side of the equation = | 320 | × | 150 | x |
| = | 48000 | x |
| 60750 | + | 150 | x | = | 48000 | x |
| 150 | x | − | 48000 | x | = | - | 60750 |
| - | 47850 | x | = | - | 60750 |
| 60750 | = | 47850 | x |
| 47850 | x | = | 60750 |
| x | = | 60750 | ÷ | 47850 |
| = | 60750 | × | 1 47850 |
| = | 405 | × | 1 319 |
| x | = | 405 319 |
| x | = | 1.269592 |