| ( | 5 | × | 220 | + | 92 | x | ) | ÷ | 407 50 | = | ( | 92 | ( | 30 | − | x | ) | + | 80 | ( | 2163 50 | + | x | ) | ) | ÷ | 3663 50 |
| 方程左边 = | 5 | × | 220 | × | 50 407 | + | 92 | x | × | 50 407 |
| = | 5000 37 | + | 4600 407 | x |
5000 37 | + | 4600 407 | x | = | ( | 92 | ( | 30 | − | x | ) | + | 80 | ( | 2163 50 | + | x | ) | ) | ÷ | 3663 50 |
| 方程右边 = | 92 | ( | 30 | − | x | ) | × | 50 3663 | + | 80 | ( | 2163 50 | + | x | ) | × | 50 3663 |
| = | 4600 3663 | ( | 30 | − | x | ) | + | 4000 3663 | ( | 2163 50 | + | x | ) |
| = | 4600 3663 | × | 30 | − | 4600 3663 | x | + | 4000 3663 | ( | 2163 50 | + | x | ) |
| = | 46000 1221 | − | 4600 3663 | x | + | 4000 3663 | ( | 2163 50 | + | x | ) |
| = | 46000 1221 | − | 4600 3663 | x | + | 4000 3663 | × | 2163 50 | + | 4000 3663 | x |
| = | 46000 1221 | − | 4600 3663 | x | + | 57680 1221 | + | 4000 3663 | x |
| = | 34560 407 | − | 200 1221 | x |
5000 37 | + | 4600 407 | x | = | 34560 407 | − | 200 1221 | x |
4600 407 | x | + | 200 1221 | x | = | 34560 407 | − | 5000 37 |
14000 1221 | x | = | 34560 407 | − | 5000 37 |
14000 1221 | x | = | - | 20440 407 |
| x | = | - | 20440 407 | ÷ | 14000 1221 |
| = | - | 20440 407 | × | 1221 14000 |
| = | - | 73 | × | 3 50 |
| x | = | - | 219 50 |
| x | = | - 4.38 |