x | ÷ | 48 | − | x | ÷ | ( | 48 | + | 12 | ) | = | 5 |
方程两边同时乘以: | ( | 48 | + | 12 | ) |
x | ÷ | 48 | × | ( | 48 | + | 12 | ) | − | x | = | 5 | ( | 48 | + | 12 | ) |
x | ÷ | 48 | × | 48 | + | x | ÷ | 48 | × | 12 | − | x | = | 5 | ( | 48 | + | 12 | ) |
x | ÷ | 48 | × | 48 | + | x | ÷ | 48 | × | 12 | − | x | = | 5 | × | 48 | + | 5 | × | 12 |
x | × | 1 | + | x | × | 1 4 | − | x | = | 240 | + | 60 |
1 4 | x | = | 300 |
x | = | 300 | ÷ | 1 4 |
= | 300 | × | 4 |
x | = | 1200 |