During a school year, a student was given an award of 25 c for each maths test he passed and was fined 50 c for each maths test he failed. At the end of the school year, the students had passed 7 times as many tests as he had failed, and received $3.75. How many tests did he fail?
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7*x*0.25-x*0.5=3.75
x=3
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为什么x乘以0.5？
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3 tests.
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因为是50cents啊！
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把Fail test 的次数设为X. 算式和二楼一样。
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还有一题求解. 谢谢
The XYZ club collected a total of $1.21 from its members with each member contributing the same amount . If each member paid for his or her share with 3coins,how many 5cent coins were contributed?
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22，对吗？
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不知道怎么做 ，题目有点confuse
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请问怎么做出22的？
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答案对吗？
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还没答案，这是olympiad maths
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121=11x11, 没有其他因数，只能是11个人每人11分。
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11分3个硬币，只能是5，5，1
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题目很老了，还有1分的。楼上正解。一共11个人，22个5分的。
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还有一分的 ，谢谢，ls都白条，明天还。
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