(n-9)*3=21

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Solution for (n-9)*3=21 equation:


Simplifying
(n + -9) * 3 = 21

Reorder the terms:
(-9 + n) * 3 = 21

Reorder the terms for easier multiplication:
3(-9 + n) = 21
(-9 * 3 + n * 3) = 21
(-27 + 3n) = 21

Solving
-27 + 3n = 21

Solving for variable 'n'.

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

Add '27' to each side of the equation.
-27 + 27 + 3n = 21 + 27

Combine like terms: -27 + 27 = 0
0 + 3n = 21 + 27
3n = 21 + 27

Combine like terms: 21 + 27 = 48
3n = 48

Divide each side by '3'.
n = 16

Simplifying
n = 16

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