| ( | x | + | 695 | ) | ÷ | 879 | + | x | = | 4 5 |
| 方程左边 = | x | × | 1 879 | + | 695 | × | 1 879 | + | x |
| = | x | × | 1 879 | + | 695 879 | + | x |
| = | 880 879 | x | + | 695 879 |
880 879 | x | + | 695 879 | = | 4 5 |
880 879 | x | = | 4 5 | − | 695 879 |
880 879 | x | = | 41 4395 |
| x | = | 41 4395 | ÷ | 880 879 |
| = | 41 4395 | × | 879 880 |
| = | 41 1465 | × | 293 880 |
| x | = | 12013 1289200 |
| x | = | 0.009318 |