127 250 | ( | 50 | + | 34 5 | X | ) | = | 123 250 | ( | 40 | + | 17 2 | X | ) |
| 方程左边 = | 127 250 | × | 50 | + | 127 250 | × | 34 5 | X |
| = | 127 5 | + | 2159 625 | X |
127 5 | + | 2159 625 | X | = | 123 250 | ( | 40 | + | 17 2 | X | ) |
| 方程右边 = | 123 250 | × | 40 | + | 123 250 | × | 17 2 | X |
| = | 492 25 | + | 2091 500 | X |
127 5 | + | 2159 625 | X | = | 492 25 | + | 2091 500 | X |
2159 625 | X | − | 2091 500 | X | = | 492 25 | − | 127 5 |
| - | 1819 2500 | X | = | 492 25 | − | 127 5 |
| - | 1819 2500 | X | = | - | 143 25 |
143 25 | = | 1819 2500 | X |
1819 2500 | X | = | 143 25 |
| X | = | 143 25 | ÷ | 1819 2500 |
| = | 143 25 | × | 2500 1819 |
| = | 143 | × | 100 1819 |
| X | = | 14300 1819 |
| X | = | 7.861462 |