( | 309 2 | + | 383 2 | ) | ÷ | 31 | × | x | + | 248 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 124 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1117 |
方程左边 = | ( | 309 2 | + | 383 2 | ) | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
( | 309 2 | + | 383 2 | ) | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 1117 |
方程左边 = | 309 2 | × | 1 31 | x | + | 383 2 | × | 1 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
= | 309 62 | x | + | 383 62 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
= | 346 31 | x | + | 8 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
= | 346 31 | x | + | 8 | x | + | 8 | × | 15 | + | 4 | ( | x | + | 30 | ) |
= | 346 31 | x | + | 8 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
= | 594 31 | x | + | 120 | + | 4 | ( | x | + | 30 | ) |
= | 594 31 | x | + | 120 | + | 4 | x | + | 4 | × | 30 |
= | 594 31 | x | + | 120 | + | 4 | x | + | 120 |
= | 718 31 | x | + | 240 |
718 31 | x | + | 240 | = | 1117 |
718 31 | x | = | 1117 | − | 240 |
718 31 | x | = | 877 |
x | = | 877 | ÷ | 718 31 |
= | 877 | × | 31 718 |
x | = | 27187 718 |
x | = | 37.864903 |