270 | ÷ | 31 | × | x | + | 186 | ÷ | 31 | × | ( | x | + | 15 | ) | + | 93 | ÷ | 31 | × | ( | x | + | 30 | ) | = | 1567 |
方程左边 = | 270 31 | x | + | 6 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) |
270 31 | x | + | 6 | ( | x | + | 15 | ) | + | 3 | ( | x | + | 30 | ) | = | 1567 |
方程左边 = | 270 31 | x | + | 6 | x | + | 6 | × | 15 | + | 3 | ( | x | + | 30 | ) |
= | 270 31 | x | + | 6 | x | + | 90 | + | 3 | ( | x | + | 30 | ) |
= | 456 31 | x | + | 90 | + | 3 | ( | x | + | 30 | ) |
= | 456 31 | x | + | 90 | + | 3 | x | + | 3 | × | 30 |
= | 456 31 | x | + | 90 | + | 3 | x | + | 90 |
= | 549 31 | x | + | 180 |
549 31 | x | + | 180 | = | 1567 |
549 31 | x | = | 1567 | − | 180 |
549 31 | x | = | 1387 |
x | = | 1387 | ÷ | 549 31 |
= | 1387 | × | 31 549 |
x | = | 42997 549 |
x | = | 78.318761 |