( | 870 | + | x | ) | ÷ | 50 | = | ( | 1310 | + | x | ) | ÷ | 70 |
方程左边 = | 870 | × | 1 50 | + | x | × | 1 50 |
= | 87 5 | + | x | × | 1 50 |
87 5 | + | 1 50 | x | = | ( | 1310 | + | x | ) | ÷ | 70 |
方程右边 = | 1310 | × | 1 70 | + | x | × | 1 70 |
= | 131 7 | + | x | × | 1 70 |
87 5 | + | 1 50 | x | = | 131 7 | + | 1 70 | x |
1 50 | x | − | 1 70 | x | = | 131 7 | − | 87 5 |
1 175 | x | = | 131 7 | − | 87 5 |
1 175 | x | = | 46 35 |
x | = | 46 35 | ÷ | 1 175 |
= | 46 35 | × | 175 |
= | 46 | × | 5 |
x | = | 230 |