75 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 120 |
方程左边 = | 75 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | × | 1 | ÷ | 3 |
= | 50 | + | x | × | 1 3 |
50 | + | 1 3 | x | = | 120 |
1 3 | x | = | 120 | − | 50 |
1 3 | x | = | 70 |
x | = | 70 | ÷ | 1 3 |
= | 70 | × | 3 |
x | = | 210 |
75 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 65 |
方程左边 = | 75 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | × | 1 | ÷ | 3 |
= | 50 | + | x | × | 1 3 |
50 | + | 1 3 | x | = | 65 |
1 3 | x | = | 65 | − | 50 |
1 3 | x | = | 15 |
x | = | 15 | ÷ | 1 3 |
= | 15 | × | 3 |
x | = | 45 |
125 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 90 |
方程左边 = | 125 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 250 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 250 3 | + | x | × | 1 | ÷ | 3 |
= | 250 3 | + | x | × | 1 3 |
250 3 | + | 1 3 | x | = | 90 |
1 3 | x | = | 90 | − | 250 3 |
1 3 | x | = | 20 3 |
x | = | 20 3 | ÷ | 1 3 |
= | 20 3 | × | 3 |
= | 20 | × | 1 |
x | = | 20 |
75 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 120 |
方程左边 = | 75 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | × | 1 | ÷ | 3 |
= | 50 | + | x | × | 1 3 |
50 | + | 1 3 | x | = | 120 |
1 3 | x | = | 120 | − | 50 |
1 3 | x | = | 70 |
x | = | 70 | ÷ | 1 3 |
= | 70 | × | 3 |
x | = | 210 |
75 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 90 |
方程左边 = | 75 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | ( | 1 | ÷ | 3 | ) |
= | 50 | + | x | × | 1 | ÷ | 3 |
= | 50 | + | x | × | 1 3 |
50 | + | 1 3 | x | = | 90 |
1 3 | x | = | 90 | − | 50 |
1 3 | x | = | 40 |
x | = | 40 | ÷ | 1 3 |
= | 40 | × | 3 |
x | = | 120 |
125 | ( | 2 | ÷ | 3 | ) | + | x | ( | 1 | ÷ | 3 | ) | = | 120 |
方程左边 = | 125 | × | 2 | ÷ | 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 250 3 | + | x | ( | 1 | ÷ | 3 | ) |
= | 250 3 | + | x | × | 1 | ÷ | 3 |
= | 250 3 | + | x | × | 1 3 |
250 3 | + | 1 3 | x | = | 120 |
1 3 | x | = | 120 | − | 250 3 |
1 3 | x | = | 110 3 |
x | = | 110 3 | ÷ | 1 3 |
= | 110 3 | × | 3 |
= | 110 | × | 1 |
x | = | 110 |