I need a lot of practice with word problems. I can learn to turn problems around, backwards and forwards, but I need to practice this a lot. Any additional resources online for struggling students would be appreciated.

Just for practice I took on this problem and couldn't come up with an equation to represent the time it would take the experienced a/c working alone. All I could see was: x = new a/c and 2x = the experienced a/c; together their work represents 6 hours time or

x + 2x = 6. But that is not what the question is about. The question is about how long would the experienced a/c work --

Would that be 6 - 2x = 0 ...

What I need to learn is how to think about these questions in a mathematical way ... my natural thought processes are the opposite

(intuitive), but I know I can learn ... I just need repetition, repetition ad infinitum ...

Thanks!