Question

John is w years old. His sister is 16 years old and his brother is twice johns age all three siblings have a total age of 31

Answer 1

Explanation:

John's age = w

His brother's age = 2*w = 2w

His sister's age = 16 years

Total age of all siblings = 31

w + 16 + 2w = 31

w + 2w + 16 = 31

Combine like terms

3w + 16 = 31

Subtract 16 from both sides

3w = 31 - 16

3w = 15

w = 15/3

w = 5

`\boxed{\text{John's age = 5 years }}`

His brother's age = 2w

= 2*5

= 10

`\boxed{\text{John's brother's age = 10 years}}`