Question

11- | 4- x | =4
its an absolute value equation

Answer 1

first isolate the absolute value. then use
\[ \large |a|=b\qquad\Leftrightarrow\qquad a=b\vee a=-b \]

Answer 2

how do i get rid of the coefficient @helder_edwin

Answer 3

\[ \large 11-|4-x|=4 \]
\[ \large 7=11-4=|4-x| \]