SOLUTION: A boy is 12 years old . his father is four times as old. In x years' time, the father will be three times as old as the son. Calculate the value of x.

Question 1009724: A boy is 12 years old . his father is four times as old. In x years' time, the father will be three times as old as the son. Calculate the value of x.
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52803) (Show Source): You can put this solution on YOUR website!
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A boy is 12 years old. His father is four times as old. In x years' time, the father will be three times as old as the son. Calculate the value of x.
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According to the first part of the condition, the father is 48 years now.

The second part of the condition gives an equation

3*(x + 12) = x + 48.

Simplify and solve it:

3x + 36 = x + 48,

2x = 48 - 36 = 12,

x = = 6.

Answer. In 6 years.

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

A boy is 12 years old . his father is four times as old. In x years' time, the father will be three times as old as the son. Calculate the value of x.

Value of x:
Thus, in 6 years' time, father will be 3 times as old as son will be, then.
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