АЛГЕБРА ОЧЕНЬ СРОЧНО!!!

1)
$\left \{ {log_{3}(x+y)=2} \atop {9^{log_{3}\sqrt{x-y}}=5}} \right. \\ \left \{ x+y=9} \atop {3^{2log_{3}\sqrt{x-y}}=5}} \right. \\ \left \{ x=9-y} \atop {3^{log_{3}(x-y)}=5}} \right. \\ \left \{ x=9-y} \atop {x-y=5}} \right. \\ \left \{ x=9-y} \atop {x=5+y}} \right. \\ 9-y=5+y \\ 2y=4 \\ y=2, x=7$
2)
$f(x)=x^{log_{2}x+2} \\ x^{log_{2}x+2}=8 \\ x^{ log_{2}4x=8 \\$
Я еще попытаюсь доделать второе