Question

John is twice as old as Joseph. Three years from now, the sum of their ages will be 42. How old is John?

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Given :-

let's take the Joseph age be x,

therefore, John's age will be 2x,

Three years from now, the sum of their age is 42

Equation formed,

$(x \: + \: 3) + (2x \: + \: 3) \: = \: 42$

To find :-

Age of John

Solution :-

$(x \: + \: 3) + (2x \: + \: 3) = 42$

$3x \: + 6 \: = \: 42$

$3x \: = \: 42 \: - \: 6$

$3x \: = \: 36$

$x \: = \: \frac{36}{3}$

$x \: = \: 12$

Conclusion :-

Joseph's age = x = 12 years

John's age = 2x = 2 × 12 = 24 years