Hello this question is so confusing to me, can you solve and explain it to me?

Hello this question is so confusing to me, can you solve and explain it to me? The question is: Choose the system of equations in X and Y describing the situation. Leroy has $12 less in his pocket than Donna has. If Donna had $8 more, she would have 3 times as much money as Leroy. I need you to show me the system of X and Y to describe this scenario.

Thanks