( | X | + | 500 | ÷ | 12 | ) | × | 85 | + | 305 | X | + | ( | X | − | 300 | ÷ | 12 | ) | × | 42 | = | 382592 |
方程左边 = | X | × | 85 | + | 500 | ÷ | 12 | × | 85 | + | 305 | X | + | ( | X | − | 300 | ÷ | 12 | ) | × | 42 |
= | X | × | 85 | + | 10625 3 | + | 305 | X | + | ( | X | − | 300 | ÷ | 12 | ) | × | 42 |
= | 390 | X | + | 10625 3 | + | ( | X | − | 300 | ÷ | 12 | ) | × | 42 |
= | 390 | X | + | 10625 3 | + | X | × | 42 | − | 300 | ÷ | 12 | × | 42 |
= | 390 | X | + | 10625 3 | + | X | × | 42 | − | 1050 |
= | 432 | X | + | 7475 3 |
432 | X | + | 7475 3 | = | 382592 |
432 | X | = | 382592 | − | 7475 3 |
432 | X | = | 1140301 3 |
X | = | 1140301 3 | ÷ | 432 |
= | 1140301 3 | × | 1 432 |
X | = | 1140301 1296 |
X | = | 879.861883 |