21n+12=8n+278.5

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Solution for 21n+12=8n+278.5 equation:


Simplifying
21n + 12 = 8n + 278.5

Reorder the terms:
12 + 21n = 8n + 278.5

Reorder the terms:
12 + 21n = 278.5 + 8n

Solving
12 + 21n = 278.5 + 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.
12 + 21n + -8n = 278.5 + 8n + -8n

Combine like terms: 21n + -8n = 13n
12 + 13n = 278.5 + 8n + -8n

Combine like terms: 8n + -8n = 0
12 + 13n = 278.5 + 0
12 + 13n = 278.5

Add '-12' to each side of the equation.
12 + -12 + 13n = 278.5 + -12

Combine like terms: 12 + -12 = 0
0 + 13n = 278.5 + -12
13n = 278.5 + -12

Combine like terms: 278.5 + -12 = 266.5
13n = 266.5

Divide each side by '13'.
n = 20.5

Simplifying
n = 20.5

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