Question 834694
"a number times one less than the number is zero" translates to {{{x(x-1) = 0}}}


Solve for x


{{{x(x-1) = 0}}}


{{{x=0}}} or {{{x-1 = 0}}}


{{{x=0}}} or {{{x = 1}}}


So the number is either 0 or 1.