( | ( | ( | x | × | 3 | × | 7 4 | ) | − | 1500 | ) | + | ( | ( | x | × | 8 5 | ) | − | 1500 | ) | ) | × | 20 | = | 300000 |
方程左边 = | ( | ( | x | × | 3 | × | 7 4 | ) | − | 1500 | ) | × | 20 | + | ( | ( | x | × | 8 5 | ) | − | 1500 | ) | × | 20 |
= | ( | x | × | 3 | × | 7 4 | ) | × | 20 | − | 1500 | × | 20 | + | ( | ( | x | × | 8 5 | ) | − | 1500 | ) | × | 20 |
= | ( | x | × | 3 | × | 7 4 | ) | × | 20 | − | 30000 | + | ( | ( | x | × | 8 5 | ) | − | 1500 | ) | × | 20 |
= | x | × | 3 | × | 7 4 | × | 20 | − | 30000 | + | ( | ( | x | × | 8 5 | ) | − | 1500 | ) | × | 20 |
= | x | × | 105 | − | 30000 | + | ( | ( | x | × | 8 5 | ) | − | 1500 | ) | × | 20 |
= | 105 | x | − | 30000 | + | ( | x | × | 8 5 | ) | × | 20 | − | 1500 | × | 20 |
= | 105 | x | − | 30000 | + | ( | x | × | 8 5 | ) | × | 20 | − | 30000 |
= | 105 | x | − | 60000 | + | ( | x | × | 8 5 | ) | × | 20 |
= | 105 | x | − | 60000 | + | x | × | 8 5 | × | 20 |
= | 105 | x | − | 60000 | + | x | × | 32 |
= | 137 | x | − | 60000 |
137 | x | − | 60000 | = | 300000 |
137 | x | = | 300000 | + | 60000 |
137 | x | = | 360000 |
x | = | 360000 | ÷ | 137 |
= | 360000 | × | 1 137 |
x | = | 360000 137 |
x | = | 2627.737226 |