设聪聪x枚邮票,笑笑(171-x)枚邮票, 1 4 x=(171-x)× 1 5 , 1 4 x= 171 5 - 1 5 x, 1 4 x+ 1 5 x= 171 5 - 1 5 x+ 1 5 x, 9 20 x= 171 5 , 9 20 x÷ 9 20 = 171 5 ÷ 9 20 , 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.