Five years ago, the sum of Sebastian's age and his sister's age was 3/4 of their father's age. How old is their father today if Sebastian is 40 years old and 10 years older than his sister?
Панҷ сол пеш, ҷамъи синни Себастян ва синни хоҳараш 3/4 синни падаршон буд. Имрӯз падаршон чандсола аст, агар Себастян 40 сола бошад ва 10 сол аз хоҳараш калонтар бошад?
How old is Sebastian's sister? ** If Sebastian is 40 years old and 10 years older than his sister, his sister is 40-10=<<40-10=30>>30 years old.
How old was Sebastian five years ago? ** Five years ago, Sebastian was 40-5=<<40-5=35>>35 years old.
How old was Sebastian's sister five years ago? ** Similarly, Sebastian's sister's age was 30-5=<<30-5=25>>25 years old.
What was the sum of their ages five years ago? ** The sum of their ages five years ago was 25+35=<<25+35=60>>60
What was the sum of their ages five years ago? ** Five years ago, the sum of Sebastian's age and his sister's age was 3/4 of their father's age, meaning their father's age was 60 / 3/4 = 80 years.
What is the father's age today? ** The father's age is now 80+5=<<80+5=85>>85
#### 85
How old is Sebastian's sister? ** Агар Себастян 40 сол дошта бошад ва 10 сол калонтар аз хоҳараш бошад, хоҳараш 40-10=<<40-10=30>>30 сол дорад.  
How old was Sebastian five years ago? ** Панҷ сол пеш, Себастян 40-5=<<40-5=35>>35 сол дошт.  
How old was Sebastian's sister five years ago? ** Ҳамчунин, синни хоҳари Себастян 30-5=<<30-5=25>>25 сол буд.  
What was the sum of their ages five years ago? ** Маблағи синнусолҳои онҳо панҷ сол пеш 25+35=<<25+35=60>>60 буд.  
What was the sum of their ages five years ago? ** Панҷ сол пеш, маҷмӯи синни Себастян ва хоҳараш 3/4 синни падар буд, яъне синни падар 60 / 3/4 = 80 сол буд.  
What is the father's age today? ** Синни падар ҳоло 80+5=<<80+5=85>>85 сол аст.  
#### 85