Solve the following algebraic equations:

$$
x = 9 - 6
$$
$$
x = \boxed{\text{3}}
$$

$$
x = 9 + 6
$$
$$
x = \boxed{\text{15}}
$$

$$
y = 4 - 7
$$
$$
y = \boxed{\text{-3}}
$$

$$
y = 4 + 7
$$
$$
y = \boxed{\text{11}}
$$

$$
n = -5 - 2
$$
$$
n = \boxed{\text{-7}}
$$

$$
n = -5 + 2
$$
$$
n = \boxed{\text{-3}}
$$

$$
x = 0 - 3
$$
$$
x = \boxed{\text{-3}}
$$

$$
x = 0 + 3
$$
$$
x = \boxed{\text{3}}
$$

$$
y = -8 - 6
$$
$$
y = \boxed{\text{-14}}
$$

$$
-x = -1 + 4
$$
$$
-x = 3
$$

$$
x = \boxed{\text{-3}}
$$