AMC / AIME · Systems of Equations · AIME / USAJMO / AMO
Systems of Equations: (Proof track.) Give a complete justification. Solve math; find math.
Linear and nonlinear systems.
Try the problem
**(Proof track.)** Give a complete justification. Solve ; find .
Hint and answer
Concept to use
Contest systems.
Hint
Look for a symmetric identity before solving more variables than necessary.
Answer
14
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