| 800 | x | × | 113 400 | + | 150 | x | × | 2 | x | + | 300 | x | = | ( | 800 | + | 150 | + | 300 | ) | x | × | 20 100 |
| Left side of the equation = | 226 | x | + | 300 | x | x | + | 300 | x |
| = | 526 | x | + | 300 | x | x |
| 526 | x | + | 300 | x | x | = | ( | 800 | + | 150 | + | 300 | ) | x | × | 20 100 |
| Right side of the equation = | 800 | x | × | 20 100 | + | 150 | x | × | 20 100 | + | 300 | x | × | 20 100 |
| = | 160 | x | + | 30 | x | + | 60 | x |
| = | 250 | x |
| 526 | x | + | 300 | x | x | = | 250 | x |
| x1= | - | 23 25 |
| x2=0 |