20000 | ÷ | x | + | 17600 | ÷ | ( | x | + | 30 | ) | = | 10000 | ÷ | 70 |
方程两边同时乘以: | x |
20000 | + | 17600 | ÷ | ( | x | + | 30 | ) | × | x | = | 10000 | ÷ | 70 | × | x |
方程两边同时乘以: | ( | x | + | 30 | ) |
20000 | ( | x | + | 30 | ) | + | 17600 | x | = | 10000 | ÷ | 70 | × | x | ( | x | + | 30 | ) |
20000 | x | + | 20000 | × | 30 | + | 17600 | x | = | 10000 | ÷ | 70 | × | x | ( | x | + | 30 | ) |
20000 | x | + | 20000 | × | 30 | + | 17600 | x | = | 10000 | ÷ | 70 | × | x | x | + | 10000 | ÷ | 70 | × | x | × | 30 |
20000 | x | + | 600000 | + | 17600 | x | = | 1000 7 | x | x | + | 30000 7 | x |
37600 | x | + | 600000 | = | 1000 7 | x | x | + | 30000 7 | x |
x1= | - | 84 5 |