12n-7(n+12)=2(5n+6)+9

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Solution for 12n-7(n+12)=2(5n+6)+9 equation:


Simplifying
12n + -7(n + 12) = 2(5n + 6) + 9

Reorder the terms:
12n + -7(12 + n) = 2(5n + 6) + 9
12n + (12 * -7 + n * -7) = 2(5n + 6) + 9
12n + (-84 + -7n) = 2(5n + 6) + 9

Reorder the terms:
-84 + 12n + -7n = 2(5n + 6) + 9

Combine like terms: 12n + -7n = 5n
-84 + 5n = 2(5n + 6) + 9

Reorder the terms:
-84 + 5n = 2(6 + 5n) + 9
-84 + 5n = (6 * 2 + 5n * 2) + 9
-84 + 5n = (12 + 10n) + 9

Reorder the terms:
-84 + 5n = 12 + 9 + 10n

Combine like terms: 12 + 9 = 21
-84 + 5n = 21 + 10n

Solving
-84 + 5n = 21 + 10n

Solving for variable 'n'.

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

Add '-10n' to each side of the equation.
-84 + 5n + -10n = 21 + 10n + -10n

Combine like terms: 5n + -10n = -5n
-84 + -5n = 21 + 10n + -10n

Combine like terms: 10n + -10n = 0
-84 + -5n = 21 + 0
-84 + -5n = 21

Add '84' to each side of the equation.
-84 + 84 + -5n = 21 + 84

Combine like terms: -84 + 84 = 0
0 + -5n = 21 + 84
-5n = 21 + 84

Combine like terms: 21 + 84 = 105
-5n = 105

Divide each side by '-5'.
n = -21

Simplifying
n = -21

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