Consider the function f(x)=logx−2(x2−7x+10)f(x) = \log_{x-2}(x^2 - 7x + 10)f(x)=logx−2(x2−7x+10). Find the sum of all values of xxx for which f(x)=2f(x) = 2f(x)=2.
7
8.5
14
No real solutions