( | x | − | 20 | − | 36 | ) | × | 3 4 | ÷ | 80 | = | ( | x | − | 20 | ) | × | 3 4 | ÷ | 100 |
方程左边 = | ( | x | − | 20 | − | 36 | ) | × | 3 320 |
( | x | − | 20 | − | 36 | ) | × | 3 320 | = | ( | x | − | 20 | ) | × | 3 4 | ÷ | 100 |
方程左边 = | x | × | 3 320 | − | 20 | × | 3 320 | − | 36 | × | 3 320 |
= | x | × | 3 320 | − | 3 16 | − | 27 80 |
= | 3 320 | x | − | 21 40 |
3 320 | x | − | 21 40 | = | ( | x | − | 20 | ) | × | 3 4 | ÷ | 100 |
方程右边 = | ( | x | − | 20 | ) | × | 3 400 |
3 320 | x | − | 21 40 | = | ( | x | − | 20 | ) | × | 3 400 |
方程右边 = | x | × | 3 400 | − | 20 | × | 3 400 |
= | x | × | 3 400 | − | 3 20 |
3 320 | x | − | 21 40 | = | 3 400 | x | − | 3 20 |
3 320 | x | − | 3 400 | x | = | - | 3 20 | + | 21 40 |
3 1600 | x | = | - | 3 20 | + | 21 40 |
3 1600 | x | = | 3 8 |
x | = | 3 8 | ÷ | 3 1600 |
= | 3 8 | × | 1600 3 |
= | 1 | × | 200 |
x | = | 200 |