12(4+n)+(-2n-9)=18

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Solution for 12(4+n)+(-2n-9)=18 equation: 


Simplifying
12(4 + n) + (-2n + -9) = 18
(4 * 12 + n * 12) + (-2n + -9) = 18
(48 + 12n) + (-2n + -9) = 18

Reorder the terms:
48 + 12n + (-9 + -2n) = 18

Remove parenthesis around (-9 + -2n)
48 + 12n + -9 + -2n = 18

Reorder the terms:
48 + -9 + 12n + -2n = 18

Combine like terms: 48 + -9 = 39
39 + 12n + -2n = 18

Combine like terms: 12n + -2n = 10n
39 + 10n = 18

Solving
39 + 10n = 18

Solving for variable 'n'.

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

Add '-39' to each side of the equation.
39 + -39 + 10n = 18 + -39

Combine like terms: 39 + -39 = 0
0 + 10n = 18 + -39
10n = 18 + -39

Combine like terms: 18 + -39 = -21
10n = -21

Divide each side by '10'.
n = -2.1

Simplifying
n = -2.1

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