9 | x | − | ( | 360 | − | 30 | ) | = | ( | 3 | x | − | 90 | ) | ÷ | 2 |
Left side of the equation = | 9 | x | − | 360 | + | 30 |
= | 9 | x | − | 330 |
9 | x | − | 330 | = | ( | 3 | x | − | 90 | ) | ÷ | 2 |
Right side of the equation = | 3 | x | × | 1 2 | − | 90 | × | 1 2 |
= | 3 2 | x | − | 45 |
9 | x | − | 330 | = | 3 2 | x | − | 45 |
9 | x | − | 3 2 | x | = | - | 45 | + | 330 |
15 2 | x | = | - | 45 | + | 330 |
15 2 | x | = | 285 |
x | = | 285 | ÷ | 15 2 |
= | 285 | × | 2 15 |
= | 19 | × | 2 |
x | = | 38 |