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A father is 9 times as old as his son. In three years, the father will be 6 times as old as his son.

How old is the son?

 Jun 28, 2021

Best Answer 

 #1
avatar+35057 
+2

f = 9s

 

in three years

 

f+3 = 6 (s+3)        sub in the red equation

9s + 3 = 6s + 18

3s = 15

s =   5  y/o

 Jun 28, 2021
 #1
avatar+35057 
+2
Best Answer

f = 9s

 

in three years

 

f+3 = 6 (s+3)        sub in the red equation

9s + 3 = 6s + 18

3s = 15

s =   5  y/o

ElectricPavlov Jun 28, 2021

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