| 20 | × | 157 50 | × | 3 5 | ( | x | − | 20 | ) | = | ( | 2 | × | 157 50 | × | 1 8 | ( | 450 | − | x | ) | ) | ÷ | 1823 10000 |
| 方程左边 = | 942 25 | ( | x | − | 20 | ) |
942 25 | ( | x | − | 20 | ) | = | ( | 2 | × | 157 50 | × | 1 8 | ( | 450 | − | x | ) | ) | ÷ | 1823 10000 |
| 方程左边 = | 942 25 | x | − | 942 25 | × | 20 |
| = | 942 25 | x | − | 3768 5 |
942 25 | x | − | 3768 5 | = | ( | 2 | × | 157 50 | × | 1 8 | ( | 450 | − | x | ) | ) | ÷ | 1823 10000 |
| 方程右边 = | 2 | × | 157 50 | × | 1 8 | ( | 450 | − | x | ) | × | 10000 1823 |
| = | 7850 1823 | ( | 450 | − | x | ) |
| = | 7850 1823 | × | 450 | − | 7850 1823 | x |
| = | 3532500 1823 | − | 7850 1823 | x |
942 25 | x | − | 3768 5 | = | 3532500 1823 | − | 7850 1823 | x |
942 25 | x | + | 7850 1823 | x | = | 3532500 1823 | + | 3768 5 |
1913516 45575 | x | = | 3532500 1823 | + | 3768 5 |
1913516 45575 | x | = | 24531564 9115 |
| x | = | 24531564 9115 | ÷ | 1913516 45575 |
| = | 24531564 9115 | × | 45575 1913516 |
| = | 39063 1823 | × | 9115 3047 |
| x | = | 356059245 5554681 |
| x | = | 195315 3047 |
| x | = | 64.100755 |