You can put this solution on YOUR website! This is not an equation since there is no equal sign.
It is an expression.
It can't be solved but can only be reduced or simplified.
(9a-2b)-(5a-3b)
the trick is the minus sign in front of the second set of parentheses.
Did you remember that minus a minus is a plus (+3b)
9a-2b-5a+3b
combine like terms
9a-5a-2b+3b
now simplify
9a-5a=4a
-2b+3b=b
or
3b-2b=1b=b
so we get
4a+b
