$2$

$10^2$

$10^5$

$5$

$5x=55$

$x-\frac{x}{5}-55=0$

$5x+x=55$

$x+\frac{x}{5}+55=0$

$28$

$110$

$92$

$100$

$20$

$15$

$50$

$25$

$12$

$8$

$16$

$4$

$\frac{3}{16}$

$\frac{1}{16}$

$\frac{19}{184}$

$\frac{57}{184}$

$1$

$6$

$7$

$2$

$-50\overrightarrow{i}-70\overrightarrow{j}$

$50\overrightarrow{i}+70\overrightarrow{j}$

$-110\overrightarrow{i}-10\overrightarrow{j}$

$110\overrightarrow{i}+10\overrightarrow{j}$

$24\pi$

$144\pi$

$6\pi$

$36\pi$