if (x-1)/(x)=20 then x=
\(D:x eq0\\\\\frac{x-1}{x}=20\ \ \ \ |cross\ multiply\\\\20x=x-1\ \ \ \ |subtract\ x\ from\ both\ sides\\\\19x=-1\ \ \ \ \ \ |divide\ both\ sides\ by\ 19\\\\\boxed{x=-\frac{1}{19}}\)
(x-1)/(x)=2020x=x-120x-x=-119x=-1x=-(1/19)
