A student solved this problem by working backwards. Joani has some stuffed animals. She has 2 times as many as Lily. Lily has 6 stuffed animals. Joanie gave 2 away and bought 4 more. How many stuffed animals does Joani have now? Students's solution: Lily has 6 stuffed animals, so Joani had 6 * 2 to begin with. So Joani had 12 stuffed animals. She gave away 2, so 12 - 2 = 10. She bought 4, so 10 + 4 = 14. So Joani has 14 stuffed animals. Here is another problem that can also be solved by working backwards. Wyatt has 3 times as many baseballs as golf balls. He has 5 fewer tennis balls than baseballs. Wyatt has 4 golf balls. How many tennis balls does Wyatt have?
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