520 | × | 1000000 | = | 69 5 | x | × | 456 | ( | 420 | − | x | ÷ | 2 | ) | + | 69 5 | ( | 1000 | − | 456 | ) | × | 100 | ( | 420 | − | 100 | ÷ | 2 | ) |
方程左边 = | 520000000 |
520000000 | = | 69 5 | x | × | 456 | ( | 420 | − | x | ÷ | 2 | ) | + | 69 5 | ( | 1000 | − | 456 | ) | × | 100 | ( | 420 | − | 100 | ÷ | 2 | ) |
方程右边 = | 31464 5 | x | ( | 420 | − | x | ÷ | 2 | ) | + | 1380 | ( | 1000 | − | 456 | ) | ( | 420 | − | 100 | ÷ | 2 | ) |
520000000 | = | 31464 5 | x | ( | 420 | − | x | ÷ | 2 | ) | + | 1380 | ( | 1000 | − | 456 | ) | ( | 420 | − | 100 | ÷ | 2 | ) |
方程右边 = | 31464 5 | x | × | 420 | − | 31464 5 | x | x | ÷ | 2 | + | 1380 | ( | 1000 | − | 456 | ) | ( | 420 | − | 100 | ÷ | 2 | ) |
= | 2642976 | x | − | 15732 5 | x | x | + | 1380 | ( | 1000 | − | 456 | ) | ( | 420 | − | 100 | ÷ | 2 | ) |
= | 2642976 | x | − | 15732 5 | x | x | + | 1380 | × | 1000 | ( | 420 | − | 100 | ÷ | 2 | ) | − | 1380 | × | 456 | ( | 420 | − | 100 | ÷ | 2 | ) |
= | 2642976 | x | − | 15732 5 | x | x | + | 1380000 | ( | 420 | − | 100 | ÷ | 2 | ) | − | 629280 | ( | 420 | − | 100 | ÷ | 2 | ) |
= | 2642976 | x | − | 15732 5 | x | x | + | 1380000 | × | 420 | − | 1380000 | × | 100 | ÷ | 2 | − | 629280 | ( | 420 | − | 100 | ÷ | 2 | ) |
= | 2642976 | x | − | 15732 5 | x | x | + | 579600000 | − | 69000000 | − | 629280 | ( | 420 | − | 100 | ÷ | 2 | ) |
= | 2642976 | x | − | 15732 5 | x | x | + | 510600000 | − | 629280 | ( | 420 | − | 100 | ÷ | 2 | ) |
= | 2642976 | x | − | 15732 5 | x | x | + | 510600000 | − | 629280 | × | 420 | + | 629280 | × | 100 | ÷ | 2 |
= | 2642976 | x | − | 15732 5 | x | x | + | 510600000 | − | 264297600 | + | 31464000 |
= | 2642976 | x | − | 15732 5 | x | x | + | 277766400 |
520000000 | = | 2642976 | x | − | 15732 5 | x | x | + | 277766400 |