[tex]\it a)\\ \\ \dfrac{17}{2x-1} > 1 \Rightarrow 2x-1 < 17|_{+1} \Rightarrow 2x < 18|_{:2}\Rightarrow x < 9 \Rightarrow x\in\{1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7,\ 8\}\\ \\ \\ b)\\ \\ \dfrac{y}{27}=\dfrac{\ 8^{(4}}{12} \Rightarrow \dfrac{y}{27}=\dfrac{^{9)}2}{\ 3} \Rightarrow \dfrac{y}{27}=\dfrac{18}{27} \Rightarrow y=18[/tex]
[tex]\it c)\\ \\ \dfrac{z+2}{2z-1}=\dfrac{2}{3} \Rightarrow 4z-2=3z+6 \Rightarrow 4z-3z=6+2 \Rightarrow z=8[/tex]
