The father

The father is 36 years old. The son is six years old. How many years will a father be three times older than a son?

Correct answer:

x =  9

Step-by-step explanation:


36+x = 3(6+x)

36+x = 3·(6+x)

2x = 18


x = 18/2 = 9

x = 9

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