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MATH / The arithmetic mean (or average) of A, B and C is 10. The value of A is six less than the value of B, and the value of C is three more than the value of B. What is the value of C?

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problem

The arithmetic mean (or average) of AA, BB and CC is 10. The value of AA is six less than the value of BB, and the value of CC is three more than the value of BB. What is the value of CC?
Plain-text mathematical notation (without MathML)
The arithmetic mean (or average) of A, B and C is 10. The value of A is six less than the value of B, and the value of C is three more than the value of B. What is the value of C?
Original LaTeX notation
The arithmetic mean (or average) of $A$, $B$ and $C$ is 10. The value of $A$ is six less than the value of $B$, and the value of $C$ is three more than the value of $B$. What is the value of $C$?

level

Level 3

type

Algebra

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