Seven years ago, thrice George’s age was equal to five more than twice Percy’s age. If Percy is three years older than George, how old will Percy be next year?1 pointA. 18B. 19C. 21D. 22
Question
Seven years ago, thrice George’s age was equal to five more than twice Percy’s age. If Percy is three years older than George, how old will Percy be next year?1 pointA. 18B. 19C. 21D. 22
Solution
Let's denote George's age seven years ago as G and Percy's age seven years ago as P.
From the problem, we know two things:
-
3G = 2P + 5 (Seven years ago, thrice George’s age was equal to five more than twice Percy’s age)
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P = G + 3 (Percy is three years older than George)
We can substitute the second equation into the first to get:
3G = 2(G + 3) + 5 3G = 2G + 6 + 5 3G = 2G + 11 G = 11
Substituting G = 11 into the second equation gives:
P = 11 + 3 P = 14
So, Percy was 14 years old seven years ago. Therefore, next year Percy will be 14 + 7 (years ago) + 1 (next year) = 22 years old.
So, the answer is D. 22.
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