7n-21=

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Solution for 7n-21= equation: 


Simplifying
7n + -21 = 0

Reorder the terms:
-21 + 7n = 0

Solving
-21 + 7n = 0

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 + 7n = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 7n = 0 + 21
7n = 0 + 21

Combine like terms: 0 + 21 = 21
7n = 21

Divide each side by '7'.
n = 3

Simplifying
n = 3

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