Question

A man is thrice as old as his son . Five year ago a man was four times as old as his son. find their present age​

Answer 1

Answer:

let son age be x

let his father's age be 3x

Step-by-step explanation:

five years ago

son's age is x-5

father's age is 3x-5

according to the give equation

3x-5 =4(x-5)

3x-5 =4x-20

3x-4x=-20+5

-x=-15

x=15

finding the present age

son's age is x=15

then, father's age is 3x=3×15=45

therefore the answer is 45

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