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Abagcontainssome$2and$5coins.Ifthetotalamountofthecoinsis$90andthereare10$5coins,findthenumberof$2coinsinthebag
题目详情
A bag contains some $2 and $5 coins.If the total amount of the coins is $90 and there are 10 $5
coins ,find the number of $2 coins in the bag
coins ,find the number of $2 coins in the bag
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答案和解析
90 minus 10X$5 equals $40 and then $40 ÷ 2 =20 so,there are 20 $2 coins in your bag
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