60 | x | = | ( | x | − | 4 | ) | ( | 60 | + | 12 | ) |
方程右边 = | x | ( | 60 | + | 12 | ) | − | 4 | ( | 60 | + | 12 | ) |
= | x | × | 60 | + | x | × | 12 | − | 4 | ( | 60 | + | 12 | ) |
= | 72 | x | − | 4 | ( | 60 | + | 12 | ) |
= | 72 | x | − | 4 | × | 60 | − | 4 | × | 12 |
= | 72 | x | − | 240 | − | 48 |
= | 72 | x | − | 288 |
60 | x | = | 72 | x | − | 288 |
60 | x | − | 72 | x | = | - | 288 |
- | 12 | x | = | - | 288 |
288 | = | 12 | x |
12 | x | = | 288 |
x | = | 288 | ÷ | 12 |
= | 288 | × | 1 12 |
= | 24 | × | 1 |
x | = | 24 |