12n-30=-21+9n+2n

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Solution for 12n-30=-21+9n+2n equation:


Simplifying
12n + -30 = -21 + 9n + 2n

Reorder the terms:
-30 + 12n = -21 + 9n + 2n

Combine like terms: 9n + 2n = 11n
-30 + 12n = -21 + 11n

Solving
-30 + 12n = -21 + 11n

Solving for variable 'n'.

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

Add '-11n' to each side of the equation.
-30 + 12n + -11n = -21 + 11n + -11n

Combine like terms: 12n + -11n = 1n
-30 + 1n = -21 + 11n + -11n

Combine like terms: 11n + -11n = 0
-30 + 1n = -21 + 0
-30 + 1n = -21

Add '30' to each side of the equation.
-30 + 30 + 1n = -21 + 30

Combine like terms: -30 + 30 = 0
0 + 1n = -21 + 30
1n = -21 + 30

Combine like terms: -21 + 30 = 9
1n = 9

Divide each side by '1'.
n = 9

Simplifying
n = 9

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