SOLUTION: An elementary-school-age child wants to have a lemonade stand. She wants to sell each glass of lemonade for $0.25. She has determined that each glass of lemonade costs about $0.15

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Question 684479: An elementary-school-age child wants to have a lemonade stand. She wants to sell each glass of lemonade for $0.25. She has determined that each glass of lemonade costs about $0.15 to make (for lemons and sugar). It costs her $20.00 for materials to make the lemonade stand. How many glasses of lemonade must she sell to break even?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
She breaks even when profit = 0
Let +P+ = profit
Let +n+ = number of glasses sold
+P+=+.25n+-+.15n+-+20+
+P+=+.1n+-+20+
+P+=+0+
+.1n+-+20+=+0+
+.1n+=+20+
+n+=+200+
She must sell 200 glasses to break even