8n-21=3(-n+4)

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Solution for 8n-21=3(-n+4) equation:


Simplifying
8n + -21 = 3(-1n + 4)

Reorder the terms:
-21 + 8n = 3(-1n + 4)

Reorder the terms:
-21 + 8n = 3(4 + -1n)
-21 + 8n = (4 * 3 + -1n * 3)
-21 + 8n = (12 + -3n)

Solving
-21 + 8n = 12 + -3n

Solving for variable 'n'.

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

Add '3n' to each side of the equation.
-21 + 8n + 3n = 12 + -3n + 3n

Combine like terms: 8n + 3n = 11n
-21 + 11n = 12 + -3n + 3n

Combine like terms: -3n + 3n = 0
-21 + 11n = 12 + 0
-21 + 11n = 12

Add '21' to each side of the equation.
-21 + 21 + 11n = 12 + 21

Combine like terms: -21 + 21 = 0
0 + 11n = 12 + 21
11n = 12 + 21

Combine like terms: 12 + 21 = 33
11n = 33

Divide each side by '11'.
n = 3

Simplifying
n = 3

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