Emma wants to save money to buy a new bicycle that costs $240. She plans to save $15 each week from her allowance. Additionally, she finds a part-time job where she earns $10 per hour and works 5 hours every Saturday. If she saves all her allowance and earnings from the job, how many weeks will it take for Emma to save enough money to buy the bicycle? Let's think step by step and output the final answer within \boxed{}.
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