( | 100 | − | 2 | ( | x | − | 50 | ) | ) | ( | x | − | 40 | ) | = | 1350 |
Left side of the equation = | 100 | ( | x | − | 40 | ) | − | 2 | ( | x | − | 50 | ) | ( | x | − | 40 | ) |
= | 100 | x | − | 100 | × | 40 | − | 2 | ( | x | − | 50 | ) | ( | x | − | 40 | ) |
= | 100 | x | − | 4000 | − | 2 | ( | x | − | 50 | ) | ( | x | − | 40 | ) |
= | 100 | x | − | 4000 | − | 2 | x | ( | x | − | 40 | ) | + | 2 | × | 50 | ( | x | − | 40 | ) |
= | 100 | x | − | 4000 | − | 2 | x | ( | x | − | 40 | ) | + | 100 | ( | x | − | 40 | ) |
= | 100 | x | − | 4000 | − | 2 | x | x | + | 2 | x | × | 40 | + | 100 | ( | x | − | 40 | ) |
= | 100 | x | − | 4000 | − | 2 | x | x | + | 80 | x | + | 100 | ( | x | − | 40 | ) |
= | 180 | x | − | 4000 | − | 2 | x | x | + | 100 | ( | x | − | 40 | ) |
= | 180 | x | − | 4000 | − | 2 | x | x | + | 100 | x | − | 100 | × | 40 |
= | 180 | x | − | 4000 | − | 2 | x | x | + | 100 | x | − | 4000 |
= | 280 | x | − | 8000 | − | 2 | x | x |
280 | x | − | 8000 | − | 2 | x | x | = | 1350 |