We need to get x alone, to do that we add 1 to both sides to cancel out the -1 on the right.
-4 = x -1
+1 +1
-3=x
This means x is equal to -3. Hope this helps!
N is the variable, you solve by subtracting 6 from 20, getting n = 14.
Answer:
A
Step-by-step explanation: