3n+5n-12=90

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Solution for 3n+5n-12=90 equation:


Simplifying
3n + 5n + -12 = 90

Reorder the terms:
-12 + 3n + 5n = 90

Combine like terms: 3n + 5n = 8n
-12 + 8n = 90

Solving
-12 + 8n = 90

Solving for variable 'n'.

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

Add '12' to each side of the equation.
-12 + 12 + 8n = 90 + 12

Combine like terms: -12 + 12 = 0
0 + 8n = 90 + 12
8n = 90 + 12

Combine like terms: 90 + 12 = 102
8n = 102

Divide each side by '8'.
n = 12.75

Simplifying
n = 12.75

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