100 | ÷ | S | × | ( | 50 | S | + | 4 | ) | + | 2 | = | 0 |
方程两边同时乘以: | S |
100 | ( | 50 | S | + | 4 | ) | + | 2 | S | = | 0 |
100 | × | 50 | S | + | 100 | × | 4 | + | 2 | S | = | 0 |
5000 | S | + | 400 | + | 2 | S | = | 0 |
5002 | S | + | 400 | = | 0 |
5002 | S | = | 0 | − | 400 |
5002 | S | = | - | 400 |
S | = | - | 400 | ÷ | 5002 |
= | - | 400 | × | 1 5002 |
= | - | 200 | × | 1 2501 |
S | = | - | 200 2501 |
S | = | - 0.079968 |