( | 60 | − | 2 | X | ) | X | × | 12 | X | × | 305 | X | × | 2 | + | 16 | X | ( | 120 | − | 2 | X | × | 12 | ) | X | × | 305 | = | X | X | × | 12 | X | × | 400 | X | × | 4 | + | ( | 120 | − | 2 | X | × | 12 | ) | × | 12 | X | × | 400 | X |
Left side of the equation = | ( | 60 | − | 2 | X | ) | X | × | 7320 | X | X | + | 4880 | X | ( | 120 | − | 2 | X | × | 12 | ) | X |
( | 60 | − | 2 | X | ) | X | × | 7320 | X | X | + | 4880 | X | ( | 120 | − | 2 | X | × | 12 | ) | X | = | X | X | × | 12 | X | × | 400 | X | × | 4 | + | ( | 120 | − | 2 | X | × | 12 | ) | × | 12 | X | × | 400 | X |
Left side of the equation = | 60 | X | × | 7320 | X | X | − | 2 | X | X | × | 7320 | X | X | + | 4880 |
= | 439200 | X | X | X | − | 14640 | X | X | X | X | + | 4880 | X | ( | 120 | − | 2 | X | × | 12 | ) |
= | 439200 | X | X | X | − | 14640 | X | X | X | X | + | 4880 | X | × | 120 |
= | 439200 | X | X | X | − | 14640 | X | X | X | X | + | 585600 | X | X |
439200 | X | X | X | − | 14640 | X | X | X | X | + | 585600 | X | X | = | X | X | × | 12 | X | × | 400 | X | × | 4 | + | ( | 120 | − | 2 | X | × | 12 | ) | × | 12 | X | × | 400 | X |
Right side of the equation = | X | X | × | 19200 | X | X | + | ( | 120 | − | 2 | X | × | 12 | ) | × | 9600 | X | X |
439200 | X | X | X | − | 14640 | X | X | X | X | + | 585600 | X | X | = | X | X | × | 19200 | X | X | + | ( | 120 | − | 2 | X | × | 12 | ) | × | 9600 | X | X |
Right side of the equation = | X | X | × | 19200 | X | X | + | 120 | × | 9600 | X | X | − | 2 | X | × | 12 |
= | X | X | × | 19200 | X | X | + | 1152000 | X | X | − | 230400 | X | X | X |
439200 | X | X | X | − | 14640 | X | X | X | X | + | 585600 | X | X | = | X | X | × | 19200 | X | X | + | 1152000 | X | X | − | 230400 | X | X | X |