| ( | 190 | + | 210 | ) | ÷ | V | − | ( | 190 | + | 210 | ) | × | 5 4 | = | 1 |
| Multiply both sides of the equation by: | V |
| ( | 190 | + | 210 | ) | − | ( | 190 | + | 210 | ) | × | 5 4 | V | = | 1 | V |
| 190 | + | 210 | − | ( | 190 | + | 210 | ) | × | 5 4 | V | = | 1 | V |
| 400 | − | ( | 190 | + | 210 | ) | × | 5 4 | V | = | 1 | V |
| 400 | − | 190 | × | 5 4 | V | − | 210 | × | 5 4 | V | = | 1 | V |
| 400 | − | 475 2 | V | − | 525 2 | V | = | 1 | V |
| 400 | − | 500 | V | = | 1 | V |
| - | 500 | V | − | 1 | V | = | - | 400 |
| - | 501 | V | = | - | 400 |
| 400 | = | 501 | V |
| 501 | V | = | 400 |
| V | = | 400 | ÷ | 501 |
| = | 400 | × | 1 501 |
| V | = | 400 501 |
| V | = | 0.798403 |