Sam has a flag with an area of $\text{110} \text{square} \text{inches }\left({\mathrm{in}}^2\right)$. Sam plans to enlarge the flag by sewing on pieces of colored nylon, where each piece would increase the flag's area by $64 {\mathrm{in}}^2$. Which equation gives the flag's total area $y$, in square inches, after Sam sews on $x$ pieces of nylon?