| 2000 | = | ( | 50 | − | x | ) | ( | 9223372036854775807 | + | 2 | x | ) |
| 方程右边 = | 50 | ( | 9223372036854775807 | + | 2 | x | ) | − | x | ( | 9223372036854775807 | + | 2 | x | ) |
| = | 50 | × | 9223372036854775807 | + | 50 | × | 2 | x | − | x | ( | 9223372036854775807 | + | 2 | x | ) |
| = | -50 | + | 100 | x | − | x | ( | 9223372036854775807 | + | 2 | x | ) |
| = | -50 | + | 100 | x | − | x | × | 9223372036854775807 | − | x | × | 2 | x |