-3(4n+5)=21

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Solution for -3(4n+5)=21 equation:


Simplifying
-3(4n + 5) = 21

Reorder the terms:
-3(5 + 4n) = 21
(5 * -3 + 4n * -3) = 21
(-15 + -12n) = 21

Solving
-15 + -12n = 21

Solving for variable 'n'.

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

Add '15' to each side of the equation.
-15 + 15 + -12n = 21 + 15

Combine like terms: -15 + 15 = 0
0 + -12n = 21 + 15
-12n = 21 + 15

Combine like terms: 21 + 15 = 36
-12n = 36

Divide each side by '-12'.
n = -3

Simplifying
n = -3

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