Question 1045214
The age of a father is 5 more the age of 6 times the age of his son. 7 years after, the age of the father becomes 3 times the age of son. Find their present ages?

let x be son age
father age is     6x+5

after 7 years

x+7
6x+12

6x+12=(x+7)*3
x=3


3       23
10       30
indeed 30=3*10