81 | ( | x | − | 2 | ) | = | 69 | ( | x | + | 9 | ) |
Left side of the equation = | 81 | x | − | 81 | × | 2 |
= | 81 | x | − | 162 |
81 | x | − | 162 | = | 69 | ( | x | + | 9 | ) |
Right side of the equation = | 69 | x | + | 69 | × | 9 |
= | 69 | x | + | 621 |
81 | x | − | 162 | = | 69 | x | + | 621 |
81 | x | − | 69 | x | = | 621 | + | 162 |
12 | x | = | 621 | + | 162 |
12 | x | = | 783 |
x | = | 783 | ÷ | 12 |
= | 783 | × | 1 12 |
= | 261 | × | 1 4 |
x | = | 261 4 |
x | = | 65.25 |