SOLUTION: Janet is X, her brother is 3 years older than her. Find the sum of their age.

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Question 726928: Janet is X, her brother is 3 years older than her. Find the sum of their age.
Answer by lenny460(1073) About Me  (Show Source):
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Janet is x years old. Her brother is 3 years older than her. Find the sum of their age.

Janet is x years old.
Let the age of her brother be: x + 3 years.
Therefore:
The sum of their ages:
x + x + 3 = 2x + 3

Answer:
2x + 3