This is actually pretty easy. <span>Simplifying
4n + -9 = -9
Reorder the terms:
-9 + 4n = -9
Add '9' to each side of the equation.
-9 + 9 + 4n = -9 + 9
Combine like terms: -9 + 9 = 0
0 + 4n = -9 + 9
4n = -9 + 9
Combine like terms: -9 + 9 = 0
4n = 0
Solving
4n = 0
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Divide each side by '4'.
n = 0
Simplifying
n = 0
****hope this helps!!!! please put as brainliest if possible!!!! really appreciated!! </span>
The subtraction theorem states that for all real numbers, and , . (To subtract, we can add the inverse.) Thus, we can have the these two equivalent expressions.