( | 2500 | − | 250 | x | ) | ÷ | ( | 2000 | + | 200 | x | ) | = | ( | 2500 | − | 2500 | x | ) | ÷ | ( | 1200 | + | 2500 | x | ) |
方程两边同时乘以: | ( | 2000 | + | 200 | x | ) | , | ( | 1200 | + | 2500 | x | ) |
( | 2500 | − | 250 | x | ) | ( | 1200 | + | 2500 | x | ) | = | ( | 2500 | − | 2500 | x | ) | ( | 2000 | + | 200 | x | ) |
2500 | ( | 1200 | + | 2500 | x | ) | − | 250 | x | ( | 1200 | + | 2500 | x | ) | = | ( | 2500 | − | 2500 | x | ) | ( | 2000 | + | 200 | x | ) |
2500 | ( | 1200 | + | 2500 | x | ) | − | 250 | x | ( | 1200 | + | 2500 | x | ) | = | 2500 | ( | 2000 | + | 200 | x | ) | − | 2500 | x | ( | 2000 | + | 200 | x | ) |
2500 | × | 1200 | + | 2500 | × | 2500 | x | − | 250 | x | ( | 1200 | + | 2500 | x | ) | = | 2500 | ( | 2000 | + | 200 | x | ) | − | 2500 | x | ( | 2000 | + | 200 | x | ) |
2500 | × | 1200 | + | 2500 | × | 2500 | x | − | 250 | x | ( | 1200 | + | 2500 | x | ) | = | 2500 | × | 2000 | + | 2500 | × | 200 | x | − | 2500 | x | ( | 2000 | + | 200 | x | ) |
3000000 | + | 6250000 | x | − | 250 | x | ( | 1200 | + | 2500 | x | ) | = | 5000000 | + | 500000 | x | − | 2500 | x | ( | 2000 | + | 200 | x | ) |
3000000 | + | 6250000 | x | − | 250 | x | × | 1200 | − | 250 | x | × | 2500 | x | = | 5000000 | + | 500000 | x | − | 2500 | x | ( | 2000 | + | 200 | x | ) |
3000000 | + | 6250000 | x | − | 250 | x | × | 1200 | − | 250 | x | × | 2500 | x | = | 5000000 | + | 500000 | x | − | 2500 | x | × | 2000 | − | 2500 | x | × | 200 | x |
3000000 | + | 6250000 | x | − | 300000 | x | − | 625000 | x | x | = | 5000000 | + | 500000 | x | − | 5000000 | x | − | 500000 | x | x |
3000000 | + | 5950000 | x | − | 625000 | x | x | = | 5000000 | − | 4500000 | x | − | 500000 | x | x |