( | 42309 1000 | + | x | ) | × | 31 20 | = | 42309 1000 | + | 37209 500 | − | x |
方程左边 = | 42309 1000 | × | 31 20 | + | x | × | 31 20 |
= | 1311579 20000 | + | x | × | 31 20 |
1311579 20000 | + | 31 20 | x | = | 42309 1000 | + | 37209 500 | − | x |
方程右边 = | 116727 1000 | − | x |
1311579 20000 | + | 31 20 | x | = | 116727 1000 | − | x |
31 20 | x | + | x | = | 116727 1000 | − | 1311579 20000 |
51 20 | x | = | 116727 1000 | − | 1311579 20000 |
51 20 | x | = | 1022961 20000 |
x | = | 1022961 20000 | ÷ | 51 20 |
= | 1022961 20000 | × | 20 51 |
= | 340987 1000 | × | 1 17 |
x | = | 340987 17000 |
x | = | 20.058059 |