Does nobody know the answer. Why can't you help a needy. Is it so tough to answer!!

Kind attention::     to meritnation experts also
Please solve it fast but in full steps
27.
$$\begin{gathered} \mathrm{If} {\mathrm{x}}_1,{\mathrm{x}}_2,...{\mathrm{x}}_{\mathrm{n}} \mathrm{are} \mathrm{n} \mathrm{values} \mathrm{of} \mathrm{a} \mathrm{variable} \mathrm{x} \mathrm{such} \mathrm{that} \sum _{\mathrm{i}=1}^{\mathrm{n}}\left({\mathrm{x}}_{\mathrm{i}}-2\right)=110 \\ \mathrm{and} \sum _{\mathrm{i}=1}^{\mathrm{n}}\left({\mathrm{x}}_{\mathrm{i}}-5\right). \mathrm{Find} \mathrm{the} \mathrm{value} \mathrm{of} \mathrm{and} \mathrm{the} \mathrm{mean} \end{gathered}$$