Question

20 Lucia is 3 years older than her sister Melissa. If the sum of their ages is 37, how old is Lucia? ​

Answer 1

Lucia is 20 years old.

Explanation:

Let the age of Melissa be x.

Solution: x+x+3=37

or, 2x=37-3

or, x=34/2

or, x=17

Therefore, Melissa is 17 years old. And since Lucia is 3 years older than Melissa, she is 17+3=20 years old.