( | X | + | 500 | ÷ | 12 | ) | × | 84 | + | 312 | X | + | ( | X | − | 300 | ÷ | 12 | ) | × | 35 | = | 381673 |
方程左边 = | X | × | 84 | + | 500 | ÷ | 12 | × | 84 | + | 312 | X | + | ( | X | − | 300 | ÷ | 12 | ) | × | 35 |
= | X | × | 84 | + | 3500 | + | 312 | X | + | ( | X | − | 300 | ÷ | 12 | ) | × | 35 |
= | 396 | X | + | 3500 | + | ( | X | − | 300 | ÷ | 12 | ) | × | 35 |
= | 396 | X | + | 3500 | + | X | × | 35 | − | 300 | ÷ | 12 | × | 35 |
= | 396 | X | + | 3500 | + | X | × | 35 | − | 875 |
= | 431 | X | + | 2625 |
431 | X | + | 2625 | = | 381673 |
431 | X | = | 381673 | − | 2625 |
431 | X | = | 379048 |
X | = | 379048 | ÷ | 431 |
= | 379048 | × | 1 431 |
X | = | 379048 431 |
X | = | 879.461717 |