21=-7n

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Solution for 21=-7n equation:


Simplifying
21 = -7n

Solving
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.
21 + 7n = -7n + 7n

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

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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