| ( | 220 | + | x | ) | x | × | 49 2000000 | × | 55 | = | 60 |
| Left side of the equation = | ( | 220 | + | x | ) | x | × | 539 400000 |
| ( | 220 | + | x | ) | x | × | 539 400000 | = | 60 |
| Left side of the equation = | 220 | x | × | 539 400000 | + | x | x | × | 539 400000 |
| = | 5929 20000 | x | + | x | x | × | 539 400000 |
5929 20000 | x | + | x | x | × | 539 400000 | = | 60 |