| ( | 68040 | − | ( | 70 100 | × | 120 | x | × | 32 500 | ) | ÷ | ( | 30 100 | × | 130 | x | + | 5 100 | × | 130 | x | ) | ) | = | 27 1000 |
| 68040 | − | ( | 70 100 | × | 120 | x | × | 32 500 | ) | ÷ | ( | 30 100 | × | 130 | x | + | 5 100 | × | 130 | x | ) | = | 27 1000 |
| 方程两边同时乘以: | ( | 30 100 | × | 130 | x | + | 5 100 | × | 130 | x | ) |
| 68040 | ( | 30 100 | × | 130 | x | + | 5 100 | × | 130 | x | ) | − | ( | 70 100 | × | 120 | x | × | 32 500 | ) | = | 27 1000 | ( | 30 100 | × | 130 | x | + | 5 100 | × | 130 | x | ) |
| 68040 | × | 30 100 | × | 130 | x | + | 68040 | × | 5 100 | × | 130 | x | − | ( | 70 100 | × | 120 | x | × | 32 500 | ) | = | 27 1000 | ( | 30 100 | × | 130 | x | + | 5 100 | × | 130 | x | ) |
| 68040 | × | 30 100 | × | 130 | x | + | 68040 | × | 5 100 | × | 130 | x | − | ( | 70 100 | × | 120 | x | × | 32 500 | ) | = | 27 1000 | × | 30 100 | × | 130 | x | + | 27 1000 | × | 5 100 | × | 130 | x |
| 2653560 | x | + | 442260 | x | − | ( | 70 100 | × | 120 | x | × | 32 500 | ) | = | 1053 1000 | x | + | 351 2000 | x |
| 3095820 | x | − | ( | 70 100 | × | 120 | x | × | 32 500 | ) | = | 2457 2000 | x |
| 3095820 | x | − | 70 100 | × | 120 | x | × | 32 500 | = | 2457 2000 | x |
| 3095820 | x | − | 672 125 | x | = | 2457 2000 | x |
386976828 125 | x | = | 2457 2000 | x |
386976828 125 | x | − | 2457 2000 | x | = | 0 |