( | ( | x | − | 300 | − | 4000 | × | 12 100 | ) | × | 3 4 | ) | ÷ | 800 | = | ( | ( | x | − | 300 | ) | × | 3 4 | ) | ÷ | 1000 |
方程左边 = | ( | x | − | 300 | − | 4000 | × | 12 100 | ) | × | 3 4 | × | 1 800 |
= | ( | x | − | 300 | − | 4000 | × | 12 100 | ) | × | 3 3200 |
= | x | × | 3 3200 | − | 300 | × | 3 3200 | − | 4000 | × | 12 100 | × | 3 3200 |
= | x | × | 3 3200 | − | 9 32 | − | 9 20 |
= | 3 3200 | x | − | 117 160 |
3 3200 | x | − | 117 160 | = | ( | ( | x | − | 300 | ) | × | 3 4 | ) | ÷ | 1000 |
方程右边 = | ( | x | − | 300 | ) | × | 3 4 | × | 1 1000 |
= | ( | x | − | 300 | ) | × | 3 4000 |
= | x | × | 3 4000 | − | 300 | × | 3 4000 |
= | x | × | 3 4000 | − | 9 40 |
3 3200 | x | − | 117 160 | = | 3 4000 | x | − | 9 40 |
3 3200 | x | − | 3 4000 | x | = | - | 9 40 | + | 117 160 |
3 16000 | x | = | - | 9 40 | + | 117 160 |
3 16000 | x | = | 81 160 |
x | = | 81 160 | ÷ | 3 16000 |
= | 81 160 | × | 16000 3 |
= | 27 | × | 100 |
x | = | 2700 |