\( \left| {2 x + 6} \right|\ –\ \left| {4\ –\ 2 x} \right| + \left| {x + 7} \right| = 4 \)
\( 2 x + 6\ –\ \left( {4\ –\ 2 x} \right) + x + 7 = 4 \)
\( 2 x + 6\ –\ 4 + 2 x + x + 7 = 4 \)
\( 5 x =\ – 3\ \ \ \ \ /:5 \)
\( x =\ – 0.6 \)
\( \normalsize K=\left\{{-0.6}\right\} \)