Re: decision vs. solution
A decision is simply what people will do (after discussion/thinking about it). It may or may not solve the issue. It may be a bad decision, or the decision may be to wait longer before doing anything.
A solution will solve a problem.
Make a decision -- most common. You may find "arrive at our decision."
Provide a solution.
Arrive at a solution.
Find a solution.
Determine a solution.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.