设活了X岁
1/6X+1/12X+1/7X+5+1/2X+4=X
1/4X+1/7X+1/2X=X-9
3/4X+1/7X=25/28X=X-9
3/28X=9
X=84
当爸爸的年纪=14+7+12=33
结婚的年纪=14+7=21