| ( | 2 | A | − | 1 | ) | × | 150 | = | ( | 4 | + | 6 | ) | × | 160 |
| Left side of the equation = | 2 | A | × | 150 | − | 1 | × | 150 |
| = | 300 | A | − | 150 |
| 300 | A | − | 150 | = | ( | 4 | + | 6 | ) | × | 160 |
| Right side of the equation = | 4 | × | 160 | + | 6 | × | 160 |
| = | 640 | + | 960 |
| = | 1600 |
| 300 | A | − | 150 | = | 1600 |
| 300 | A | = | 1600 | + | 150 |
| 300 | A | = | 1750 |
| A | = | 1750 | ÷ | 300 |
| = | 1750 | × | 1 300 |
| = | 35 | × | 1 6 |
| A | = | 35 6 |
| A | = | 5.833333 |