Step-by-step explanation:
Given the equation
-45n + 45 = 90
Step 1: Isolate n
We can isolate n by subtracting 45 from both sides
-45n + 45 - 45 = 90 - 45
-45n + 0 = 45
-45n = 45
Divide through by -45
-45n/-45 = 45/-45
n = -1
Hence, the value of n is -1
