a) de doua ori
b) de 0 ori
c) de 0 ori
d) [tex]\frac{1}{2} x=\frac{3}{4}[/tex] ⇒
[tex]x=\frac{\frac{1}{2} }{\frac{3}{4} } =\frac{1}{2} *\frac{4}{3}=\frac{4}{6} =\frac{2}{3}[/tex]
e)
[tex]\frac{2}{3}x=\frac{3}{5}-\frac{1}{3}\\\\\frac{2}{3}x=\frac{9}{15}-\frac{5}{15}\\\\\frac{2}{3}x=\frac{4}{15}\\\\x=\frac{\frac{4}{15} }{\frac{2}{3} }=\frac{4}{15} *\frac{3}{2} \\\\x=\frac{12}{30} =\frac{6}{15}[/tex]
