Father and son

Father is 44 years old, and his son is 16 years. Find how many years ago the father was five times older than the son.

Correct answer:

x =  9

Step-by-step explanation:

44-x = 5(16-x)

44-x = 5·(16-x)

4x = 36

x = 36/4 = 9

x = 9

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