75 200 | x | + | 4 | = | 4 | ÷ | 9 | × | ( | x | + | 4 | ) |
方程右边 = | 4 9 | ( | x | + | 4 | ) |
75 200 | x | + | 4 | = | 4 9 | ( | x | + | 4 | ) |
方程右边 = | 4 9 | x | + | 4 9 | × | 4 |
= | 4 9 | x | + | 16 9 |
75 200 | x | + | 4 | = | 4 9 | x | + | 16 9 |
75 200 | x | − | 4 9 | x | = | 16 9 | − | 4 |
- | 5 72 | x | = | 16 9 | − | 4 |
- | 5 72 | x | = | - | 20 9 |
20 9 | = | 5 72 | x |
5 72 | x | = | 20 9 |
x | = | 20 9 | ÷ | 5 72 |
= | 20 9 | × | 72 5 |
= | 4 | × | 8 |
x | = | 32 |