369 5 | × | 7 | + | 383 5 | X | = | 74 | ( | 7 | + | X | ) |
方程左边 = | 2583 5 | + | 383 5 | X |
2583 5 | + | 383 5 | X | = | 74 | ( | 7 | + | X | ) |
方程右边 = | 74 | × | 7 | + | 74 | X |
= | 518 | + | 74 | X |
2583 5 | + | 383 5 | X | = | 518 | + | 74 | X |
383 5 | X | − | 74 | X | = | 518 | − | 2583 5 |
13 5 | X | = | 518 | − | 2583 5 |
13 5 | X | = | 7 5 |
X | = | 7 5 | ÷ | 13 5 |
= | 7 5 | × | 5 13 |
= | 7 | × | 1 13 |
X | = | 7 13 |
X | = | 0.538462 |