| ( | 57 5000 | + | 2 | x | ) | × | 2 | = | 7 | ( | 143 10000 | − | x | ) | ( | 43 10000 | − | x | ) |
| Left side of the equation = | 57 5000 | × | 2 | + | 2 | x | × | 2 |
| = | 57 2500 | + | 4 | x |
57 2500 | + | 4 | x | = | 7 | ( | 143 10000 | − | x | ) | ( | 43 10000 | − | x | ) |
| Right side of the equation = | 7 | × | 143 10000 | ( | 43 10000 | − | x | ) | − | 7 | x | ( | 43 10000 | − | x | ) |
| = | 1001 10000 | ( | 43 10000 | − | x | ) | − | 7 | x | ( | 43 10000 | − | x | ) |
| = | 1001 10000 | × | 43 10000 | − | 1001 10000 | x | − | 7 | x | ( | 43 10000 | − | x | ) |
| = | 43043 100000000 | − | 1001 10000 | x | − | 7 | x | ( | 43 10000 | − | x | ) |
| = | 43043 100000000 | − | 1001 10000 | x | − | 7 | x | × | 43 10000 | + | 7 | x | x |
| = | 43043 100000000 | − | 1001 10000 | x | − | 301 10000 | x | + | 7 | x | x |
| = | 43043 100000000 | − | 651 5000 | x | + | 7 | x | x |
57 2500 | + | 4 | x | = | 43043 100000000 | − | 651 5000 | x | + | 7 | x | x |