Răspuns :
[tex]\bf 110.\\ \\ \it a)\ \ \overline{2x}+\overline{xx}=104 \Rightarrow 20+x+11x=104 |_{-20}\Rightarrow 12x=84|_{:12} \Rightarrow x=7[/tex]
[tex]\it b)\ \ ab=96\ \ \ \ \ (1)\\ \\ (a-9)\cdot4b=96 \Rightarrow 4ab-36b=96\ \stackrel{(1)}{\Longrightarrow}4\cdot96-36b=96 \Rightarrow 4\cdot96-96=36b \Rightarrow \\ \\ \Rightarrow 96(4-1)=36b \Rightarrow 96\cdot3=36b|_{:3} \Rightarrow 96=12b|_{:12} \Rightarrow b=8\ \ \ \ \ (2)\\ \\ (1),\ (2) \Rightarrow a\cdot8=96|_{:8} \Rightarrow a=12[/tex]