( | 40 | + | x | − | 30 | ) | ( | 600 | − | 10 | x | ) | = | 10000 |
Left side of the equation = | 40 | ( | 600 | − | 10 | x | ) | + | x | ( | 600 | − | 10 | x | ) | − | 30 | ( | 600 | − | 10 | x | ) |
= | 40 | × | 600 | − | 40 | × | 10 | x | + | x | ( | 600 | − | 10 | x | ) | − | 30 | ( | 600 | − | 10 | x | ) |
= | 24000 | − | 400 | x | + | x | ( | 600 | − | 10 | x | ) | − | 30 | ( | 600 | − | 10 | x | ) |
= | 24000 | − | 400 | x | + | x | × | 600 | − | x | × | 10 | x | − | 30 | ( | 600 | − | 10 | x | ) |
= | 24000 | + | 200 | x | − | x | × | 10 | x | − | 30 | ( | 600 | − | 10 | x | ) |
= | 24000 | + | 200 | x | − | x | × | 10 | x | − | 30 | × | 600 | + | 30 | × | 10 | x |
= | 24000 | + | 200 | x | − | x | × | 10 | x | − | 18000 | + | 300 | x |
= | 6000 | + | 500 | x | − | x | × | 10 | x |
6000 | + | 500 | x | − | x | × | 10 | x | = | 10000 |