Answer:
Isolating the variable on one side will lead to the discovery of its own value.
To isolate the variable (n), add 5 to the both sides then solve the resulting equation:
n-5 = -1
n-5+5 = -1+5
n = 4
Doubtful? Check the value obtained:
n-5 = -1
(4) -5 = -1
-1 = -1
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