$$\left. \begin{array} { l } { 25 ( x + 2 ) ^ { 2 } = ( x - 7 ) ^ { 2 } - 81 } \\ { - x + 50 ) ( 2 x + 50 ) = ( x - 7 ) \cdot ( x - } \end{array} \right.$$
$x=-2\text{, }y=52$
$x=-\frac{11}{4}=-2.75\text{, }y=\frac{211}{4}=52.75$
