8400 | ÷ | x | + | 20000 | ÷ | ( | x | + | 112 5 | ) | = | 150 |
方程两边同时乘以: | x |
8400 | + | 20000 | ÷ | ( | x | + | 112 5 | ) | × | x | = | 150 | x |
方程两边同时乘以: | ( | x | + | 112 5 | ) |
8400 | ( | x | + | 112 5 | ) | + | 20000 | x | = | 150 | x | ( | x | + | 112 5 | ) |
8400 | x | + | 8400 | × | 112 5 | + | 20000 | x | = | 150 | x | ( | x | + | 112 5 | ) |
8400 | x | + | 8400 | × | 112 5 | + | 20000 | x | = | 150 | x | x | + | 150 | x | × | 112 5 |
8400 | x | + | 188160 | + | 20000 | x | = | 150 | x | x | + | 3360 | x |
28400 | x | + | 188160 | = | 150 | x | x | + | 3360 | x |