Son 7 times older than grandson,I am 12 times older than grandson,sum of ages is 100,how old am I

Question

age of father, son, grandson = 100

Answer 1

Let age of  grandson be x years

age of father  =12x years

age of son=7x years

 

12x+7x+x=100

20x=100

x=100/20=5

age of father is 12*5=60 years, son is 7*5=35 years , grandson is 5 years.

Answer 2

what should each son receive, if a man leaves 300,000 to his 3 sons to be distributed in proportion to their ages which are 18,20 and 22,

Answer 3

Given son = grandson * 7
Me = grandson * 12
g = son / 7...(1)
g = me / 12....(2)

g = 35/7 or 5
g = 60 /12 or 5
son+me+grandson=100...(3)
solve all the equation
I am 60
Son is 35
Grandson is 5

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Answer 4

60 years old.