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19-02-2020
Mathematics

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Bob is three years older than his brother. The sum of their ages is 33. How old is bob?

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19-02-2020

Let's make Bob "x".

Brother: x - 3.

x + x-3 = 33.

Solve:

x + x - 3 = 33.

2x = 33 + 3.

2x = 36.

x = 18.

Bob is 18.

Brother is 18 - 3 = 15.

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