20 | ÷ | 135 | + | X | ÷ | 87 | − | ( | 72 | − | X | ) | ÷ | 1000 | = | 57 200 |
方程左边 = | 4 27 | + | X | × | 1 87 | − | ( | 72 | − | X | ) | × | 1 1000 |
4 27 | + | 1 87 | X | − | ( | 72 | − | X | ) | × | 1 1000 | = | 57 200 |
方程左边 = | 4 27 | + | 1 87 | X | − | 72 | × | 1 1000 | + | X | × | 1 1000 |
= | 4 27 | + | 1 87 | X | − | 9 125 | + | X | × | 1 1000 |
= | 257 3375 | + | 1087 87000 | X |
257 3375 | + | 1087 87000 | X | = | 57 200 |
1087 87000 | X | = | 57 200 | − | 257 3375 |
1087 87000 | X | = | 5639 27000 |
X | = | 5639 27000 | ÷ | 1087 87000 |
= | 5639 27000 | × | 87000 1087 |
= | 5639 9 | × | 29 1087 |
X | = | 163531 9783 |
X | = | 16.715834 |