300 | ÷ | X | − | 300 | ÷ | ( | 3 2 | − | X | ) | = | 300 |
方程两边同时乘以: | X |
300 | − | 300 | ÷ | ( | 3 2 | − | X | ) | × | X | = | 300 | X |
方程两边同时乘以: | ( | 3 2 | − | X | ) |
300 | ( | 3 2 | − | X | ) | − | 300 | X | = | 300 | X | ( | 3 2 | − | X | ) |
300 | × | 3 2 | − | 300 | X | − | 300 | X | = | 300 | X | ( | 3 2 | − | X | ) |
300 | × | 3 2 | − | 300 | X | − | 300 | X | = | 300 | X | × | 3 2 | − | 300 | X | X |
450 | − | 300 | X | − | 300 | X | = | 450 | X | − | 300 | X | X |
450 | − | 600 | X | = | 450 | X | − | 300 | X | X |
X1= | 1 2 |
X2=3 |