Question 698992

{{{ 84<x + (x +1) + (x + 2)<90}}}

{{{ 84<x + x +1 + x + 2<90}}}

{{{ 84<3x + 3<90}}}

{{{ 84-3<3x + 3-3<90-3}}}

{{{ 81<3x<87}}}

{{{ 81/3<3x/3<87/3}}}

{{{ 27<x<29}}}....so, the first number is {{{28}}}

then second number is {{{28+1=29}}} and third number is {{{28+2=30}}} 

let's check their sum

{{{ 84<x + (x +1) + (x + 2)<90}}}

{{{ 84<28 + 29 + 30<90}}}

{{{ 84<87<90}}}...it's true that their sum is a number greater than {{{84}}} and less than {{{90}}}