Odpowiedź :
Odpowiedź:
[tex]\frac{9x}{4} = \frac{1}{5}*\frac{3}{4}[/tex]
[tex]\frac{9x}{4} = \frac{3}{20} \ \ \ \ \ | * 4[/tex]
[tex]9x = \frac{12}{20} \ \ \ \ \ | / 9[/tex]
[tex]x = \frac{12}{20}*\frac{1}{9}[/tex]
[tex]x = \frac{12}{180} = \frac{1}{15}[/tex]