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58. A certain store sells chairs individually or in sets of 6.The store charges less for purchasing a set of 6 chairs than for purchasing 6 chairs individually.How much does the store charge for purchasing a set of 6 chairs?
(1)The charge for purchasing a set of 6 chairs is 10 percent less than the charge for purchasing the 6 chairs individually.
(2)The charge for purchasing a set of 6 chairs is $20 more than the charge for purchasing 5 chairs individually.
设一套的是x元,分开的是y元。有两个条件得x=0.9y; x=5y/6+20。两个方程求出来,这样的解法对吗?谢谢。
设一套的是x元,分开的是y元。有两个条件得x=0.9y; x=5y/6+20。两个方程求出来,这样的解法对吗?谢谢。
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