Question 1183772

Solve: 

{{{abs(x+7) + abs(x-4) = 13}}}

find positive and negative intervals

{{{ x+7 +  x-4 = 13}}}
{{{ 2x+3  = 13}}}
{{{ 2x  = 13-3}}}
{{{ 2x  = 10}}}
{{{ highlight(x  = 5)}}}


{{{ -(x+7) -( x-4) = 13}}}
{{{ -x-7 -x+4 = 13}}}
{{{ -2x-3  = 13}}}
{{{ -2x = 13+3}}}
{{{ -2x = 16}}}
{{{ x = 16/-2}}}
{{{ highlight(x = -8)}}}