3n+9n=-(-8n+8)+4(10+2n)

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Solution for 3n+9n=-(-8n+8)+4(10+2n) equation:


Simplifying
3n + 9n = -1(-8n + 8) + 4(10 + 2n)

Combine like terms: 3n + 9n = 12n
12n = -1(-8n + 8) + 4(10 + 2n)

Reorder the terms:
12n = -1(8 + -8n) + 4(10 + 2n)
12n = (8 * -1 + -8n * -1) + 4(10 + 2n)
12n = (-8 + 8n) + 4(10 + 2n)
12n = -8 + 8n + (10 * 4 + 2n * 4)
12n = -8 + 8n + (40 + 8n)

Reorder the terms:
12n = -8 + 40 + 8n + 8n

Combine like terms: -8 + 40 = 32
12n = 32 + 8n + 8n

Combine like terms: 8n + 8n = 16n
12n = 32 + 16n

Solving
12n = 32 + 16n

Solving for variable 'n'.

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

Add '-16n' to each side of the equation.
12n + -16n = 32 + 16n + -16n

Combine like terms: 12n + -16n = -4n
-4n = 32 + 16n + -16n

Combine like terms: 16n + -16n = 0
-4n = 32 + 0
-4n = 32

Divide each side by '-4'.
n = -8

Simplifying
n = -8

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