Question 667375
{{{abs(x+10) <= 9}}}

solution:

{{{x+10 <= 9}}} and {{{-(x+10) <= 9}}}

if {{{x+10 <= 9}}}, then {{{x<= 9-10}}}...=>..{{{x<=-1}}}

if {{{-(x+10) <= 9}}}, then {{{-x-10<= 9-10}}}...=>..{{{-x<=9+10}}}..=>..{{{-x<=19}}}..=>..{{{x>=-19}}}

so, solution is

{{{-19<=x<=-1}}}


{{{ graph( 600, 600, -25, 10, -10,5,abs(x+10)-9, abs(x+10) <= 9) }}}