( | 7140 | − | x | ) | ÷ | 8 | = | x | + | 450 |
方程左边 = | 7140 | × | 1 8 | − | x | × | 1 8 |
= | 1785 2 | − | x | × | 1 8 |
1785 2 | − | 1 8 | x | = | x | + | 450 |
- | 1 8 | x | − | x | = | 450 | − | 1785 2 |
- | 9 8 | x | = | 450 | − | 1785 2 |
- | 9 8 | x | = | - | 885 2 |
885 2 | = | 9 8 | x |
9 8 | x | = | 885 2 |
x | = | 885 2 | ÷ | 9 8 |
= | 885 2 | × | 8 9 |
= | 295 | × | 4 3 |
x | = | 1180 3 |
x | = | 393.333333 |