Robert's father is $4$ times as old as Robert. After $5$ years, father will be three times as old as Robert. Find their present ages.

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Solution

Let present age of Robert be 'x' then age of Roberts father = 4x ______ (1)
and after 5 years.
Roberts age = x+5 Roberts father age = 3(x+5)
then 4x+5=3(x+5)
4x+5=3x+15
[x=10]
present age of Robert is 10 years & age of Roberts father is 40 years.

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Robert's father is 4 times as old as Robert. After 5 years, father will be three times as old as Robert. Find their present ages.

Let present age of Robert be 'x' then age of Roberts father = 4x ______ (1)and after 5 years.Roberts age = x+5 Roberts father age = 3(x+5)then 4x+5=3(x+5)4x+5=3x+15[x=10]present age of Robert is 10 years & age of Roberts father is 40 years.

Robert's father is $4$ times as old as Robert. After $5$ years, father will be three times as old as Robert. Find their present ages.

Let present age of Robert be 'x' then age of Roberts father = 4x ______ (1)
and after 5 years.
Roberts age = x+5 Roberts father age = 3(x+5)
then 4x+5=3(x+5)
4x+5=3x+15
[x=10]
present age of Robert is 10 years & age of Roberts father is 40 years.