-3(n+3)=21-8n

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Solution for -3(n+3)=21-8n equation:


Simplifying
-3(n + 3) = 21 + -8n

Reorder the terms:
-3(3 + n) = 21 + -8n
(3 * -3 + n * -3) = 21 + -8n
(-9 + -3n) = 21 + -8n

Solving
-9 + -3n = 21 + -8n

Solving for variable 'n'.

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

Add '8n' to each side of the equation.
-9 + -3n + 8n = 21 + -8n + 8n

Combine like terms: -3n + 8n = 5n
-9 + 5n = 21 + -8n + 8n

Combine like terms: -8n + 8n = 0
-9 + 5n = 21 + 0
-9 + 5n = 21

Add '9' to each side of the equation.
-9 + 9 + 5n = 21 + 9

Combine like terms: -9 + 9 = 0
0 + 5n = 21 + 9
5n = 21 + 9

Combine like terms: 21 + 9 = 30
5n = 30

Divide each side by '5'.
n = 6

Simplifying
n = 6

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