5 100 | x | + | 5 100 | × | 7 200 | x | + | 1 2000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | − | 1 2000 | x | − | 800 | ) | × | 1 5 | = | 5 100 | x | + | 5 100 | × | 7 200 | x | + | 1 2000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | x | − | 1 2000 | x | ) | × | 4 5 | × | 1 5 |
| 方程左边 = | 5 100 | x | + | 7 4000 | x | + | 1 2000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | − | 1 2000 | x | − | 800 | ) | × | 1 5 |
| = | 209 4000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | − | 1 2000 | x | − | 800 | ) | × | 1 5 |
209 4000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | − | 1 2000 | x | − | 800 | ) | × | 1 5 | = | 5 100 | x | + | 5 100 | × | 7 200 | x | + | 1 2000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | x | − | 1 2000 | x | ) | × | 4 5 | × | 1 5 |
| 方程左边 = | 209 4000 | x | + | x | × | 1 5 | − | 5 100 | x | × | 1 5 | − | 5 100 | × | 7 200 | × | 1 5 | − | 1 2000 | x |
| = | 209 4000 | x | + | x | × | 1 5 | − | 1 100 | x | − | 7 20000 | − | 1 10000 | x | − | 160 |
| = | 4843 20000 | x | − | 3200007 20000 |
4843 20000 | x | − | 3200007 20000 | = | 5 100 | x | + | 5 100 | × | 7 200 | x | + | 1 2000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | x | − | 1 2000 | x | ) | × | 4 5 | × | 1 5 |
| 方程右边 = | 5 100 | x | + | 7 4000 | x | + | 1 2000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | x | − | 1 2000 | x | ) | × | 4 25 |
| = | 209 4000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | x | − | 1 2000 | x | ) | × | 4 25 |
4843 20000 | x | − | 3200007 20000 | = | 209 4000 | x | + | ( | x | − | 5 100 | x | − | 5 100 | × | 7 200 | x | − | 1 2000 | x | ) | × | 4 25 |
| 方程右边 = | 209 4000 | x | + | x | × | 4 25 | − | 5 100 | x | × | 4 25 | − | 5 100 | × | 7 200 | x | × | 4 25 | − | 1 2000 |
| = | 209 4000 | x | + | x | × | 4 25 | − | 1 125 | x | − | 7 25000 | x | − | 1 12500 | x |
| = | 20389 100000 | x |
4843 20000 | x | − | 3200007 20000 | = | 20389 100000 | x |
4843 20000 | x | − | 20389 100000 | x | = | 3200007 20000 |
1913 50000 | x | = | 3200007 20000 |
| x | = | 3200007 20000 | ÷ | 1913 50000 |
| = | 3200007 20000 | × | 50000 1913 |
| = | 3200007 2 | × | 5 1913 |
| x | = | 16000035 3826 |
| x | = | 4181.922373 |