Odpowiedź:
[tex]x-\frac{3x+1}{4}=\frac{1}{5}\ \ /\cdot20\\\\20x-\not20^5\cdot\frac{3x+1}{\not4_{1}}=\not20^4\cdot\frac{1}{\not5_{1}}\\\\20x-5(3x+1)=4\\\\20x-15x-5=4\\\\5x-5=4\\\\5x=4+5\\\\5x=9\ \ /:5\\\\x=\frac{9}{5}\\\\x=1\frac{4}{5}[/tex]
