SOLUTION: Tessa is 6 years younger than Grace. The sum of their ages is 72 years. How old is Grace?

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Question 963620: Tessa is 6 years younger than Grace. The sum of their ages is 72 years. How old is Grace?
Answer by macston(5194) About Me  (Show Source):
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G=Grace's age: T=Tessa's age=G-6yrs
T+G=72 years Substitute for T
(G-6yrs)+G=72 years Add 6 years to each side.
2G=78 years Divide each side by 2
G=39 years ANSWER: Grace is 39 years old.
CHECK:
T=G-6yrs=39yrs-6yrs=33yrs
Tessa is 33 years old.
T+G=72 years
33yrs+39yrs=72yrs
72yrs=72yrs