31536 | = | ( | 480 | × | 81 | − | x | ) | × | 17 20 | + | 16 | × | 81 |
方程右边 = | ( | 480 | × | 81 | − | x | ) | × | 17 20 | + | 1296 |
31536 | = | ( | 480 | × | 81 | − | x | ) | × | 17 20 | + | 1296 |
方程右边 = | 480 | × | 81 | × | 17 20 | − | x | × | 17 20 | + | 1296 |
= | 33048 | − | x | × | 17 20 | + | 1296 |
= | 34344 | − | 17 20 | x |
31536 | = | 34344 | − | 17 20 | x |
17 20 | x | = | 34344 | − | 31536 |
17 20 | x | = | 2808 |
x | = | 2808 | ÷ | 17 20 |
= | 2808 | × | 20 17 |
x | = | 56160 17 |
x | = | 3303.529412 |