Brian's age is 3/4 of Marcus'. The sum of their ages is 14. How old are Marcus and Brian?

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Brian's age is 3/4 of Marcus'. The sum of their ages is 14. How old are Marcus and Brian?

Let Marcus's age be m.
Then Brian's age = 3/4m

The sum is:
m + 3m/4 = 14

Combine like terms
7m/4 = 14

Cross multiply:
7m = 56

Plugging this into the search engine, we get m = 8.

So Brian's age = 3(8)/4 = 24/4 = 6