6155 | = | ( | ( | 220 | + | 260 | ) | × | 21 | − | x | ) | × | 9 10 |
方程右边 = | ( | 220 | + | 260 | ) | × | 21 | × | 9 10 | − | x | × | 9 10 |
= | ( | 220 | + | 260 | ) | × | 189 10 | − | x | × | 9 10 |
= | 220 | × | 189 10 | + | 260 | × | 189 10 | − | 9 10 | x |
= | 4158 | + | 4914 | − | 9 10 | x |
= | 9072 | − | 9 10 | x |
6155 | = | 9072 | − | 9 10 | x |
9 10 | x | = | 9072 | − | 6155 |
9 10 | x | = | 2917 |
x | = | 2917 | ÷ | 9 10 |
= | 2917 | × | 10 9 |
x | = | 29170 9 |
x | = | 3241.111111 |