-3(n+7)=-3(n-4)-9

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Solution for -3(n+7)=-3(n-4)-9 equation: 


Simplifying
-3(n + 7) = -3(n + -4) + -9

Reorder the terms:
-3(7 + n) = -3(n + -4) + -9
(7 * -3 + n * -3) = -3(n + -4) + -9
(-21 + -3n) = -3(n + -4) + -9

Reorder the terms:
-21 + -3n = -3(-4 + n) + -9
-21 + -3n = (-4 * -3 + n * -3) + -9
-21 + -3n = (12 + -3n) + -9

Reorder the terms:
-21 + -3n = 12 + -9 + -3n

Combine like terms: 12 + -9 = 3
-21 + -3n = 3 + -3n

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

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

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

Solving
-21 = 3

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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