一辆公交车共载乘客50人,用现金买票每张1元,刷卡买票每张0.5元.售票员最后统计出共卖得41元钱,用卡买票的有多少人?
问题描述:
一辆公交车共载乘客50人,用现金买票每张1元,刷卡买票每张0.5元.售票员最后统计出共卖得41元钱,用卡买票的有多少人?
答
设用卡买票的有x人,那么现金买票的有(50-x)人,0.5x+(50-x)×1=41, 0.5x+50-x=41, 50-0.5x+0.5x=41+0.5x, &nbs...