47 10 | ( | 69 10 | x | + | 67 10 | ) | − | 12057 200 | = | 89 10 | x | + | 13 2 |
| 方程左边 = | 47 10 | × | 69 10 | x | + | 47 10 | × | 67 10 | − | 12057 200 |
| = | 3243 100 | x | + | 3149 100 | − | 12057 200 |
| = | 3243 100 | x | − | 5759 200 |
3243 100 | x | − | 5759 200 | = | 89 10 | x | + | 13 2 |
3243 100 | x | − | 89 10 | x | = | 13 2 | + | 5759 200 |
2353 100 | x | = | 13 2 | + | 5759 200 |
2353 100 | x | = | 7059 200 |
| x | = | 7059 200 | ÷ | 2353 100 |
| = | 7059 200 | × | 100 2353 |
| = | 543 2 | × | 1 181 |
| x | = | 543 362 |
| x | = | 3 2 |
| x | = | 1.5 |