\left\{ \begin{array} { l } { 4 \frac { y } { x } - \frac { 8 g } { x ^ { 2 } } - \frac { y ^ { 2 } } { 2 g } = 0 } \\ { \frac { x y } { g } = 4 } \\ { g = 9,81 } \end{array} \right.
Solve for y, x, g
x\neq 0
y=\frac{981}{25x}
g=9,81
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