X | ÷ | 53 | + | ( | 187 5 | − | X | ) | ÷ | 1000 | = | 13 80 |
方程左边 = | 1 53 | X | + | 187 5 | × | 1 1000 | − | X | × | 1 1000 |
= | 1 53 | X | + | 187 5000 | − | X | × | 1 1000 |
= | 947 53000 | X | + | 187 5000 |
947 53000 | X | + | 187 5000 | = | 13 80 |
947 53000 | X | = | 13 80 | − | 187 5000 |
947 53000 | X | = | 1251 10000 |
X | = | 1251 10000 | ÷ | 947 53000 |
= | 1251 10000 | × | 53000 947 |
= | 1251 10 | × | 53 947 |
X | = | 66303 9470 |
X | = | 7.001373 |