8 - (3 + b) = b - 9
Opening the brackets changes the symbol to it's opposite symbol, which gives us
8 - 3 - b = b - 9
By using the transposition method, we get
8 - 3 + 9 = b + b
or, 14 = 2b
or, 14/2 = b
or, 7 = b
The value of b is 7.
