9 | ÷ | 4 | = | 81 | ÷ | 16 | − | ( | 9 | ÷ | 2 | ) | x |
方程左边 = | 9 4 |
9 4 | = | 81 | ÷ | 16 | − | ( | 9 | ÷ | 2 | ) | x |
方程右边 = | 81 16 | − | ( | 9 | ÷ | 2 | ) | x |
9 4 | = | 81 16 | − | ( | 9 | ÷ | 2 | ) | x |
方程右边 = | 81 16 | − | 9 | ÷ | 2 | × | x |
= | 81 16 | − | 9 2 | x |
9 4 | = | 81 16 | − | 9 2 | x |
9 2 | x | = | 81 16 | − | 9 4 |
9 2 | x | = | 45 16 |
x | = | 45 16 | ÷ | 9 2 |
= | 45 16 | × | 2 9 |
= | 5 8 | × | 1 |
x | = | 5 8 |
x | = | 0.625 |