21n-84=168

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Solution for 21n-84=168 equation: 


Simplifying
21n + -84 = 168

Reorder the terms:
-84 + 21n = 168

Solving
-84 + 21n = 168

Solving for variable 'n'.

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

Add '84' to each side of the equation.
-84 + 84 + 21n = 168 + 84

Combine like terms: -84 + 84 = 0
0 + 21n = 168 + 84
21n = 168 + 84

Combine like terms: 168 + 84 = 252
21n = 252

Divide each side by '21'.
n = 12

Simplifying
n = 12

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