第一题解:设妙拍睁陪想x岁x+7x=408x=40x=55x7=35(岁)答:妙想5岁,爸爸35岁第袭蠢二题解:设一只铅笔早贺x元3x+2x9.5=223x+19=223x=22-193x=3x=1答:一支铅笔1元