x | × | 3 1000 | + | ( | x | − | 500000 | ) | × | 3 20 | × | 1 100 | = | 5000 |
方程左边 = | x | × | 3 1000 | + | ( | x | − | 500000 | ) | × | 3 2000 |
3 1000 | x | + | ( | x | − | 500000 | ) | × | 3 2000 | = | 5000 |
方程左边 = | 3 1000 | x | + | x | × | 3 2000 | − | 500000 | × | 3 2000 |
= | 3 1000 | x | + | x | × | 3 2000 | − | 750 |
= | 9 2000 | x | − | 750 |
9 2000 | x | − | 750 | = | 5000 |
9 2000 | x | = | 5000 | + | 750 |
9 2000 | x | = | 5750 |
x | = | 5750 | ÷ | 9 2000 |
= | 5750 | × | 2000 9 |
x | = | 11500000 9 |
x | = | 1277777.777778 |