St. 8

Algebra Level pending

Consider the following system of equations: \[ \left\{\begin{matrix} &a+2b-c &=& 0\\ &a-b+c &=& 1\\ &3a+b+2c &=& 5 \end{matrix}\right. \] Evaluate \((a+b+c)^4 \).

This problem is not original.

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