1. Use the Addition Property of Equality to solve for the variable in the equation $y - 5 = 18$. The value of $y$ is ___.
2. To solve the equation $k + 13 = 20$, which property of equality should you use as the first step?
3. Use the Subtraction Property of Equality to solve for the variable in the equation $m + 9 = 21$. The value of $m$ is ___.
4. What is the solution to the equation $z + 8 = 14$?
5. A number $n$ decreased by 10 is equal to 3. This can be written as the equation $n - 10 = 3$. What is the value of $n$?
6. A student spent $\$3$ on a snack and now has $\$14$ left. If $m$ represents the money he started with, write an equation to find his starting amount. ___
7. A large pizza has 12 slices, which is 4 more slices than a small pizza. If $s$ represents the slices in a small pizza, which equation models this situation?
8. Leo gave 8 rocks from his collection to a friend. He now has 35 rocks left. If $r$ was his starting number of rocks, write an equation for this situation. ___
9. A building is 60 feet tall. This is 18 feet taller than a nearby tree. If $h$ is the height of the tree, write an equation to find the tree's height. ___