Question 787112

{{{-27 <= 6 x -3 <= -9 }}}

{{{-27+3 <= 6 x -3+3 <= -9+3 }}}

{{{-24 <= 6 x   <= -6 }}}

{{{-24/6 <= 6 x/6   <= -6/6 }}}

{{{-4 <=  x   <= -1 }}}


solution:

[{{{-4}}},{{{-1}}}]