Question 941992

let number be {{{x}}}

when {{{4}}} is added to {{{x}}} we have: {{{x+4}}}

when the sum is divided by {{{30}}} we have:{{{(x+4)/30}}}

the result is {{{3}}}:{{{(x+4)/30=3}}}

now we have equation {{{(x+4)/30=3}}} and we can solve it for {{{x}}}

{{{(x+4)/30=3}}}....both sides multiply by {{{30}}}

{{{30(x+4)/30=3*30}}}

{{{cross(30)(x+4)/cross(30)=90}}}

{{{x+4=90}}}

{{{x=90-4}}}

{{{x=86}}}

so, your number is {{{86}}}