[tex]-3*|x+2|+5*|x+2|+7=15-2*|x+2|-3\ \textless \ =\ \textgreater \ \\ \ \textless \ =\ \textgreater \ -3*|x+2|+5*|x+2|+2*|x+2|=15-3-7\ \textless \ =\ \textgreater \ \\ \ \textless \ =\ \textgreater \ 4*|x+2|=5=\ \textgreater \ |x+2|= \frac{5}{4} =\ \textgreater \ x+2= \frac{5}{4} ~sau~x+2=- \frac{5}{4}. \\ \\ x+2= \frac{5}{4}=\ \textgreater \ \boxed{x=-\frac{3}{4}}. \\ x+2=- \frac{5}{4}=\ \textgreater \ \boxed{x=- \frac{13}{4} } .[/tex]
