杨林今年5岁，爸爸29岁，几年后，爸爸的年龄是杨林的4倍？)f*q2g9U4Y5v:C9m.l-`5m
算式：提示:Z0r6p2v+n/u(E0N)f*q2g9U4Y5v:C9m.l-`5m
答：7p7k,\;z1O2W2P3I8M,J8c5e年后，爸爸的年龄是杨林的4倍。)f*q2g9U4Y5v:C9m.l-`5m