( | 360 | ÷ | x | ) | ( | 14 | ÷ | 15 | ) | = | 420 | ÷ | ( | x | + | 3 | ) |
方程两边同时乘以: | ( | x | + | 3 | ) |
( | 360 | ÷ | x | ) | ( | 14 | ÷ | 15 | ) | ( | x | + | 3 | ) | = | 420 |
360 | ÷ | x | × | ( | 14 | ÷ | 15 | ) | ( | x | + | 3 | ) | = | 420 |
方程两边同时乘以: | x |
360 | ( | 14 | ÷ | 15 | ) | ( | x | + | 3 | ) | = | 420 | x |
360 | × | 14 | ÷ | 15 | × | ( | x | + | 3 | ) | = | 420 | x |
336 | ( | x | + | 3 | ) | = | 420 | x |
336 | x | + | 336 | × | 3 | = | 420 | x |
336 | x | + | 1008 | = | 420 | x |
336 | x | − | 420 | x | = | - | 1008 |
- | 84 | x | = | - | 1008 |
1008 | = | 84 | x |
84 | x | = | 1008 |
x | = | 1008 | ÷ | 84 |
= | 1008 | × | 1 84 |
= | 12 | × | 1 |
x | = | 12 |