7n-5=21-5

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Solution for 7n-5=21-5 equation: 


Simplifying
7n + -5 = 21 + -5

Reorder the terms:
-5 + 7n = 21 + -5

Combine like terms: 21 + -5 = 16
-5 + 7n = 16

Solving
-5 + 7n = 16

Solving for variable 'n'.

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

Add '5' to each side of the equation.
-5 + 5 + 7n = 16 + 5

Combine like terms: -5 + 5 = 0
0 + 7n = 16 + 5
7n = 16 + 5

Combine like terms: 16 + 5 = 21
7n = 21

Divide each side by '7'.
n = 3

Simplifying
n = 3

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