| ( | x | − | 1311821381 100 | + | 505000 | − | 6189 4 | − | 1 50 | x | ) | × | 3 4 | + | 1 50 | × | 1 4 | x | = | 971 100000 | x |
| 方程左边 = | ( | x | − | 1311821381 100 | + | 505000 | − | 6189 4 | − | 1 50 | x | ) | × | 3 4 | + | 1 200 | x |
| ( | x | − | 1311821381 100 | + | 505000 | − | 6189 4 | − | 1 50 | x | ) | × | 3 4 | + | 1 200 | x | = | 971 100000 | x |
| 方程左边 = | x | × | 3 4 | − | 1311821381 100 | × | 3 4 | + | 505000 | × | 3 4 | − | 6189 4 | × | 3 4 | − | 1 50 | x | × | 3 4 | + | 1 200 |
| = | x | × | 3 4 | − | 3935464143 400 | + | 378750 | − | 18567 16 | − | 3 200 | x | + | 1 200 | x |