X | ÷ | 200 | + | ( | 35 2 | − | X | ) | ÷ | 500 | = | 3 100 |
方程左边 = | 1 200 | X | + | 35 2 | × | 1 500 | − | X | × | 1 500 |
= | 1 200 | X | + | 7 200 | − | X | × | 1 500 |
= | 3 1000 | X | + | 7 200 |
3 1000 | X | + | 7 200 | = | 3 100 |
3 1000 | X | = | 3 100 | − | 7 200 |
3 1000 | X | = | - | 1 200 |
X | = | - | 1 200 | ÷ | 3 1000 |
= | - | 1 200 | × | 1000 3 |
= | - | 1 | × | 5 3 |
X | = | - | 5 3 |
X | = | - 1.666667 |