Question 176093
{{{abs(x + 10) >= 20}}} means {{{x + 10 >= 20}}} or {{{ - ( x + 10 ) >= 20 }}}


So:


{{{x + 10 >= 20}}}


{{{x >= 10}}}


or


{{{-x -10 >= 20}}}


{{{-x >= 30}}}


{{{x <= -30}}}  (Note change of sense when multiplying by negative)