( | x | + | 10 | ) | ( | 140 | − | x | ) | = | x | × | 3 2 | ( | 130 | − | x | ) |
方程左边 = | x | ( | 140 | − | x | ) | + | 10 | ( | 140 | − | x | ) |
= | x | × | 140 | − | x | x | + | 10 | ( | 140 | − | x | ) |
= | 140 | x | − | x | x | + | 10 | × | 140 | − | 10 | x |
= | 140 | x | − | x | x | + | 1400 | − | 10 | x |
= | 130 | x | − | x | x | + | 1400 |
130 | x | − | x | x | + | 1400 | = | x | × | 3 2 | ( | 130 | − | x | ) |
方程右边 = | x | × | 3 2 | × | 130 | − | x | × | 3 2 | x |
= | x | × | 195 | − | x | × | 3 2 | x |
130 | x | − | x | x | + | 1400 | = | 195 | x | − | x | × | 3 2 | x |