| ( | 47 | − | 47 | ) | ÷ | ( | 47 | − | 34 | ) | = | ( | 70 | − | t | ) | ÷ | ( | t | − | 56 | ) |
| 方程两边同时乘以: | ( | 47 | − | 34 | ) | , | ( | t | − | 56 | ) |
| ( | 47 | − | 47 | ) | ( | t | − | 56 | ) | = | ( | 70 | − | t | ) | ( | 47 | − | 34 | ) |
| 47 | ( | t | − | 56 | ) | − | 47 | ( | t | − | 56 | ) | = | ( | 70 | − | t | ) | ( | 47 | − | 34 | ) |
| 47 | ( | t | − | 56 | ) | − | 47 | ( | t | − | 56 | ) | = | 70 | ( | 47 | − | 34 | ) | − | t | ( | 47 | − | 34 | ) |
| 47 | t | − | 47 | × | 56 | − | 47 | ( | t | − | 56 | ) | = | 70 | ( | 47 | − | 34 | ) | − | t | ( | 47 | − | 34 | ) |
| 47 | t | − | 47 | × | 56 | − | 47 | ( | t | − | 56 | ) | = | 70 | × | 47 | − | 70 | × | 34 | − | t | ( | 47 | − | 34 | ) |
| 47 | t | − | 2632 | − | 47 | ( | t | − | 56 | ) | = | 3290 | − | 2380 | − | t | ( | 47 | − | 34 | ) |
| 47 | t | − | 2632 | − | 47 | ( | t | − | 56 | ) | = | 910 | − | t | ( | 47 | − | 34 | ) |
| 47 | t | − | 2632 | − | 47 | t | + | 47 | × | 56 | = | 910 | − | t | ( | 47 | − | 34 | ) |
| 47 | t | − | 2632 | − | 47 | t | + | 47 | × | 56 | = | 910 | − | t | × | 47 | + | t | × | 34 |
| 47 | t | − | 2632 | − | 47 | t | + | 2632 | = | 910 | − | t | × | 47 | + | t | × | 34 |
| 0 | t | − | 0 | = | 910 | − | 13 | t |
| 13 | t | = | 910 | + | 0 |
| 13 | t | = | 910 |
| t | = | 910 | ÷ | 13 |
| = | 910 | × | 1 13 |
| = | 70 | × | 1 |
| t | = | 70 |