45 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 60 |
方程左边 = | 45 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 30 | + | x | ( | 1 | ÷ | 3 | ) |
= | 30 | + | x | × | 1 | ÷ | 3 |
= | 30 | + | x | × | 1 3 |
30 | + | 1 3 | x | = | 60 |
1 3 | x | = | 60 | − | 30 |
1 3 | x | = | 30 |
x | = | 30 | ÷ | 1 3 |
= | 30 | × | 3 |
x | = | 90 |
25 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 90 |
方程左边 = | 25 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 3 | + | x | × | 1 | ÷ | 3 |
= | 50 3 | + | x | × | 1 3 |
50 3 | + | 1 3 | x | = | 90 |
1 3 | x | = | 90 | − | 50 3 |
1 3 | x | = | 220 3 |
x | = | 220 3 | ÷ | 1 3 |
= | 220 3 | × | 3 |
= | 220 | × | 1 |
x | = | 220 |