Question 847869
a father is 42 years old,his son is 10 years old and his daughter is 16 years old. 
a) In how many years will the age of the father be the triple of that of his son?
b) In how many years will the age of the father be the sum of those of his children?
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let x=years
a) (32+x)/(10+x)=3
32-x=30-3x
2x=12
x=6
In how many years will the age of the father be the triple of that of his son? 6
..
b)(32+x)=(10+x+16+x)
x=6
In how many years will the age of the father be the sum of those of his children? 6