Hi there!
Answer:
Subtraction property of equality.
x=4
The answer must have a positive sign.*
Explanation:
Subtraction property of equality
a-c=b-c
First, you switch sides of an equation.

Then, you subtract by 5 from both sides of an equation.

Finally, you can also subtract by the numbers.

Answer:

Hope this helps!
Thanks!
-Charlie
:)
:D