It will take 9 years for Kevin to be only 4 times as old as Daniel.
The number of years it will take for Kevin to be only 4 times as old as Daniel can be determined by using an algebraic expression
Consider x represents the number of years that will need to pass. To represent Kevin's age, the expression can be given as;
39 + x
To represent 4 times Daniel's age, the expression can be given as;
4 × (3 + x)
In other words, this equation can be represented as Kevin's age plus x years is equal to four times Daniel's age plus x years.
Since Daniel's age needs to be equal to 4 times Daniel's age, we set the expressions equal to each other:
39 + x = 4 ( 3 + x )
39 + x = 12 + 4x
39 - 12 = 4x - x
3x = 27
x = 27 ÷ 3
x = 9
Although a part of your question is incorrect, you might be referring to this question:
Kevin is 39 years old and Daniel is 3 years old how many years will it take until Kevin is only 4 times as old as daniel
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