Solve for r, σ_x, σ_y
r=0.5
\sigma _{x}=1
\sigma _{y}=4
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\sigma _{y}=4
Solve \sigma _{y}=4 for \sigma _{y}.
r=0.5 \sigma _{x}=1 \sigma _{y}=4
The system is now solved.
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