( | 19701 500 | + | x | ) | × | 31 20 | = | 19701 500 | + | 17901 250 | − | x |
方程左边 = | 19701 500 | × | 31 20 | + | x | × | 31 20 |
= | 610731 10000 | + | x | × | 31 20 |
610731 10000 | + | 31 20 | x | = | 19701 500 | + | 17901 250 | − | x |
方程右边 = | 55503 500 | − | x |
610731 10000 | + | 31 20 | x | = | 55503 500 | − | x |
31 20 | x | + | x | = | 55503 500 | − | 610731 10000 |
51 20 | x | = | 55503 500 | − | 610731 10000 |
51 20 | x | = | 499329 10000 |
x | = | 499329 10000 | ÷ | 51 20 |
= | 499329 10000 | × | 20 51 |
= | 166443 500 | × | 1 17 |
x | = | 166443 8500 |
x | = | 19.581529 |