Question

Problem:

Pierre is 3 years older than his brother, Claude.
1. Write an equation that represents how old Pierre is (p) when Claude is (c) years old.

2. How old is Pierre when Claude is 17 years old?

Answer 1

1. We know that Pierre is 3 years older than Claude, so we can write:

p = c + 3

where p is Pierre's age and c is Claude's age.

2. To find out how old Pierre is when Claude is 17, we can substitute 17 for c in the equation we just wrote:

p = c + 3
p = 17 + 3
p = 20

Therefore, Pierre is 20 years old when Claude is 17 years old.