{\frac{1}{z} + x = 3 \frac{c^3+1}{c^3-1}, \frac{x}{z} + y = 3, \frac{y}{z} = \frac{c^3+1}{c^3-1}}{\frac{1}{z} + x = 3 \frac{c^3+1}{c^3-1}, \frac{x}{z} + y = 3, \frac{y}{z} = \frac{c^3+1}{c^3-1}}

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