-3(2n+7)=9

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Solution for -3(2n+7)=9 equation: 


Simplifying
-3(2n + 7) = 9

Reorder the terms:
-3(7 + 2n) = 9
(7 * -3 + 2n * -3) = 9
(-21 + -6n) = 9

Solving
-21 + -6n = 9

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 + -6n = 9 + 21

Combine like terms: -21 + 21 = 0
0 + -6n = 9 + 21
-6n = 9 + 21

Combine like terms: 9 + 21 = 30
-6n = 30

Divide each side by '-6'.
n = -5

Simplifying
n = -5

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