Ben spent $10 buying 3 pairs of scissors and 7 bottles of glue. He wanted to buy an additional pair of scissors but he was short of 40 cents. He changed his mind and bought an additional bottle of glue instead. He found that he had 60 cents left. How much does a bottle of glue cost?
Question
Ben spent $10 buying 3 pairs of scissors and 7 bottles of glue. He wanted to buy an additional pair of scissors but he was short of 40 cents. He changed his mind and bought an additional bottle of glue instead. He found that he had 60 cents left. How much does a bottle of glue cost?
Solution
Let's solve this step by step:
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We know that Ben spent $10 on 3 pairs of scissors and 7 bottles of glue.
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We also know that an additional pair of scissors would have cost him 40 cents more than he had, so a pair of scissors costs 0.40.
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We also know that when he bought an additional bottle of glue instead of the scissors, he had 60 cents left. So, a bottle of glue costs 0.60.
Let's calculate:
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The cost of a pair of scissors is approximately 10/3 + $0.40).
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The cost of a bottle of glue is approximately 10/7 - $0.60).
So, a bottle of glue costs approximately 83 cents.
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