Question 1045882

let's Mo's number be {{{x}}}
if eleven more than one third of the number is {{{-1}}}, we have

 {{{x/3+11=-1}}}
 {{{x/3=-1-11}}}
 {{{x/3=-12}}}
{{{x=-12*3}}}
{{{x=-36}}}

so, Mo's number is {{{-36}}}