21n-21=84

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Solution for 21n-21=84 equation: 


Simplifying
21n + -21 = 84

Reorder the terms:
-21 + 21n = 84

Solving
-21 + 21n = 84

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '21' to each side of the equation.
-21 + 21 + 21n = 84 + 21

Combine like terms: -21 + 21 = 0
0 + 21n = 84 + 21
21n = 84 + 21

Combine like terms: 84 + 21 = 105
21n = 105

Divide each side by '21'.
n = 5

Simplifying
n = 5

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