0=7n-21

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Solution for 0=7n-21 equation: 


Simplifying
0 = 7n + -21

Reorder the terms:
0 = -21 + 7n

Solving
0 = -21 + 7n

Solving for variable 'n'.

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

Add '-7n' to each side of the equation.
0 + -7n = -21 + 7n + -7n
Remove the zero:
-7n = -21 + 7n + -7n

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

Divide each side by '-7'.
n = 3

Simplifying
n = 3

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