7 | y | − | ( | 27 | − | 3 | y | ) | = | ( | 27 | − | 3 | y | ) | − | 2 |
Left side of the equation = | 7 | y | − | 27 | + | 3 | y |
= | 10 | y | − | 27 |
10 | y | − | 27 | = | ( | 27 | − | 3 | y | ) | − | 2 |
Right side of the equation = | 27 | − | 3 | y | − | 2 |
= | 25 | − | 3 | y |
10 | y | − | 27 | = | 25 | − | 3 | y |
10 | y | + | 3 | y | = | 25 | + | 27 |
13 | y | = | 25 | + | 27 |
13 | y | = | 52 |
y | = | 52 | ÷ | 13 |
= | 52 | × | 1 13 |
= | 4 | × | 1 |
y | = | 4 |