( | 236 | + | 5 | X | ) | ÷ | ( | 51 | + | X | ) | = | 49 10 |
方程两边同时乘以: | ( | 51 | + | X | ) |
( | 236 | + | 5 | X | ) | = | 49 10 | ( | 51 | + | X | ) |
236 | + | 5 | X | = | 49 10 | ( | 51 | + | X | ) |
236 | + | 5 | X | = | 49 10 | × | 51 | + | 49 10 | X |
236 | + | 5 | X | = | 2499 10 | + | 49 10 | X |
5 | X | − | 49 10 | X | = | 2499 10 | − | 236 |
1 10 | X | = | 2499 10 | − | 236 |
1 10 | X | = | 139 10 |
X | = | 139 10 | ÷ | 1 10 |
= | 139 10 | × | 10 |
= | 139 | × | 1 |
X | = | 139 |