( | 118 | + | 201 | ) | ÷ | 30 | × | x | + | 200 | ÷ | 30 | × | ( | x | + | 15 | ) | + | 120 | ÷ | 30 | × | ( | x | + | 30 | ) | = | 892 |
方程左边 = | ( | 118 | + | 201 | ) | × | 1 30 | x | + | 20 3 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
( | 118 | + | 201 | ) | × | 1 30 | x | + | 20 3 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) | = | 892 |
方程左边 = | 118 | × | 1 30 | x | + | 201 | × | 1 30 | x | + | 20 3 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
= | 59 15 | x | + | 67 10 | x | + | 20 3 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
= | 319 30 | x | + | 20 3 | ( | x | + | 15 | ) | + | 4 | ( | x | + | 30 | ) |
= | 319 30 | x | + | 20 3 | x | + | 20 3 | × | 15 | + | 4 | ( | x | + | 30 | ) |
= | 319 30 | x | + | 20 3 | x | + | 100 | + | 4 | ( | x | + | 30 | ) |
= | 173 10 | x | + | 100 | + | 4 | ( | x | + | 30 | ) |
= | 173 10 | x | + | 100 | + | 4 | x | + | 4 | × | 30 |
= | 173 10 | x | + | 100 | + | 4 | x | + | 120 |
= | 213 10 | x | + | 220 |
213 10 | x | + | 220 | = | 892 |
213 10 | x | = | 892 | − | 220 |
213 10 | x | = | 672 |
x | = | 672 | ÷ | 213 10 |
= | 672 | × | 10 213 |
= | 224 | × | 10 71 |
x | = | 2240 71 |
x | = | 31.549296 |