设聪聪x枚邮票,笑笑(171-x)枚邮票, 14x=(171-x)×15, 14x=1715-15x,14x+15x=1715-15x+15x, 920x=1715,920x÷920=1715÷920, x=76.笑笑:171-76=95(枚).答:聪聪收集的邮票76枚,笑笑收集的邮票95枚.