1 | + | ( | 680 | + | 574 | x | ) | ÷ | 2080 | + | x | = | 21 |
方程左边 = | 1 | + | 680 | × | 1 2080 | + | 574 | x | × | 1 2080 | + | x |
= | 1 | + | 17 52 | + | 287 1040 | x | + | x |
= | 69 52 | + | 1327 1040 | x |
69 52 | + | 1327 1040 | x | = | 21 |
1327 1040 | x | = | 21 | − | 69 52 |
1327 1040 | x | = | 1023 52 |
x | = | 1023 52 | ÷ | 1327 1040 |
= | 1023 52 | × | 1040 1327 |
= | 1023 | × | 20 1327 |
x | = | 20460 1327 |
x | = | 15.418237 |