3a - 4 (<)+ 5

is it a < 3

Yes.

To solve the expression 3a - 4 (<)+ 5, we need to clarify what the symbol "(<)" represents. In mathematics, there is no commonly used symbol "(<)" when it comes to arithmetic calculations. It is possible that you might have mistyped or misinterpreted the symbol.

If you could provide more information or clarify the symbol, I would be happy to assist you further in solving the expression.