[tex]\frac{1,2*\frac{3}{4} }{1,2-\frac{3}{4} } =\frac{\frac{6}{5} *\frac{3}{4} }{\frac{6}{5} -\frac{3}{4} } =\frac{\frac{3}{5} *\frac{3}{2} }{\frac{24}{20} -\frac{15}{20} } =\frac{\frac{9}{10} }{\frac{9}{20} }=\frac{9}{10} *\frac{20}{9} =2[/tex]
Pozdrawiam.
