| ( | 400 | + | x | ) | x | × | 49 2000000 | × | 56 | = | 200 |
| Left side of the equation = | ( | 400 | + | x | ) | x | × | 343 250000 |
| ( | 400 | + | x | ) | x | × | 343 250000 | = | 200 |
| Left side of the equation = | 400 | x | × | 343 250000 | + | x | x | × | 343 250000 |
| = | 343 625 | x | + | x | x | × | 343 250000 |
343 625 | x | + | x | x | × | 343 250000 | = | 200 |