( | 38 | − | 22 | − | x | ) | ( | 160 | + | x | ÷ | 3 | × | 120 | ) | = | 3640 |
方程左边 = | 38 | ( | 160 | + | x | ÷ | 3 | × | 120 | ) | − | 22 | ( | 160 | + | x | ÷ | 3 | × | 120 | ) | − | x | ( | 160 | + | x | ÷ | 3 | × | 120 | ) |
= | 38 | × | 160 | + | 38 | x | ÷ | 3 | × | 120 | − | 22 | ( | 160 | + | x | ÷ | 3 | × | 120 | ) | − | x | ( | 160 | + | x | ÷ | 3 | × | 120 | ) |
= | 6080 | + | 1520 | x | − | 22 | ( | 160 | + | x | ÷ | 3 | × | 120 | ) | − | x | ( | 160 | + | x | ÷ | 3 | × | 120 | ) |
= | 6080 | + | 1520 | x | − | 22 | × | 160 | − | 22 | x | ÷ | 3 | × | 120 | − | x | ( | 160 | + | x | ÷ | 3 | × | 120 | ) |
= | 6080 | + | 1520 | x | − | 3520 | − | 880 | x | − | x | ( | 160 | + | x | ÷ | 3 | × | 120 | ) |
= | 2560 | + | 640 | x | − | x | ( | 160 | + | x | ÷ | 3 | × | 120 | ) |
= | 2560 | + | 640 | x | − | x | × | 160 | − | x | x | ÷ | 3 | × | 120 |
= | 2560 | + | 640 | x | − | x | × | 160 | − | x | x | × | 40 |
= | 2560 | + | 480 | x | − | x | x | × | 40 |
2560 | + | 480 | x | − | x | x | × | 40 | = | 3640 |