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 |