學(xué)校合唱隊(duì)中有1/3是女隊(duì)員,后來增加了14名女隊(duì)員,這時(shí)男、女隊(duì)員的人數(shù)相等,合唱隊(duì)原有男女隊(duì)員各多少

數(shù)學(xué)人氣：398 ℃時(shí)間：2019-08-25 10:37:38

優(yōu)質(zhì)解答

①學(xué)校合唱隊(duì)中有1/3是女隊(duì)員,
則合唱隊(duì)中有男隊(duì)員有2/3
所以原合唱團(tuán)男隊(duì)員是女隊(duì)員的2倍
男=2女
②后來增加了14名女隊(duì)員,這時(shí)男、女隊(duì)員的人數(shù)相等,
原合唱團(tuán)男隊(duì)員是女隊(duì)員的2倍
說明男=2女=女+14
所以女隊(duì)員有14人,男隊(duì)員有28人列式呢？設(shè)女隊(duì)員x名則男隊(duì)員為2x2x=x+14x=14名所以女隊(duì)員有14人，男隊(duì)員有28人