[tex]\begin{gathered} -4+w+17-\frac{2}{3}w=16 \\ w-\frac{2}{3}w+17-4=16 \\ (1-\frac{2}{3})w+13=16 \\ (1-\frac{2}{3})w=16-13 \\ (1-\frac{2}{3})w=3 \\ (\frac{3}{3}-\frac{2}{3})w=3 \\ (\frac{3-2}{3})w=3 \\ \frac{1}{3}w=3 \\ w=3\cdot3 \\ w=9 \end{gathered}[/tex][tex]\begin{gathered} -12c-4+7.4c-11=-6 \\ -4.6c-15=-6 \\ -4.6c=-6+15 \\ -4.6c=9 \\ c=-\frac{9}{4.6} \\ c=-1.95 \end{gathered}[/tex]
