Given:

$\displaystyle \frac{{{x}-{8}}}{{{x}-{7}}}=\frac{{{x}-{k}}}{{{x}+{2}}}$

(1) What two values of $\displaystyle {x}$ cannot be solutions regardless of the value of $\displaystyle {k}$? 

(2)  For what values of $\displaystyle {k}$ , if any, will the given equation have no solution?