SOLUTION: Jamie is 5 years older than her sister Amy. If the sum of their ages is 19, how old is Jamie?

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Question 285610: Jamie is 5 years older than her sister Amy. If the sum of their ages is 19, how old is Jamie?

Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
j = jamie's age.
a = amy's age.

j = a + 5

sum of their ages is 19 means the sum of a + a + 5 = 19.

This becomes 2a + 5 = 19.

Subtract 5 from both sides of the equation to get 2a = 14.

Divide both sides of the equation by 2 to get a = 7.

amy is 7 years old.

jamie is 7 + 5 = 12 years old

sum of their ages is 19.




means jamie is 5 years older than amy.