( | 48 | + | x | ) | ÷ | ( | 89 | + | x | ) | = | 11 20 |
方程两边同时乘以: | ( | 89 | + | x | ) |
( | 48 | + | x | ) | = | 11 20 | ( | 89 | + | x | ) |
48 | + | x | = | 11 20 | ( | 89 | + | x | ) |
48 | + | x | = | 11 20 | × | 89 | + | 11 20 | x |
48 | + | x | = | 979 20 | + | 11 20 | x |
x | − | 11 20 | x | = | 979 20 | − | 48 |
9 20 | x | = | 979 20 | − | 48 |
9 20 | x | = | 19 20 |
x | = | 19 20 | ÷ | 9 20 |
= | 19 20 | × | 20 9 |
= | 19 | × | 1 9 |
x | = | 19 9 |
x | = | 2.111111 |