( | 16729 2 | + | 20 | + | X | ) | × | 13 400 | × | 1 | ÷ | 4 | = | X |
方程左边 = | ( | 16729 2 | + | 20 | + | X | ) | × | 13 1600 |
( | 16729 2 | + | 20 | + | X | ) | × | 13 1600 | = | X |
方程左边 = | 16729 2 | × | 13 1600 | + | 20 | × | 13 1600 | + | X | × | 13 1600 |
= | 217477 3200 | + | 13 80 | + | X | × | 13 1600 |
= | 217997 3200 | + | 13 1600 | X |
217997 3200 | + | 13 1600 | X | = | X |
13 1600 | X | − | X | = | - | 217997 3200 |
- | 1587 1600 | X | = | - | 217997 3200 |
217997 3200 | = | 1587 1600 | X |
1587 1600 | X | = | 217997 3200 |
X | = | 217997 3200 | ÷ | 1587 1600 |
= | 217997 3200 | × | 1600 1587 |
= | 217997 2 | × | 1 1587 |
X | = | 217997 3174 |
X | = | 68.682105 |