12-9n=84-30n

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Solution for 12-9n=84-30n equation:


Simplifying
12 + -9n = 84 + -30n

Solving
12 + -9n = 84 + -30n

Solving for variable 'n'.

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

Add '30n' to each side of the equation.
12 + -9n + 30n = 84 + -30n + 30n

Combine like terms: -9n + 30n = 21n
12 + 21n = 84 + -30n + 30n

Combine like terms: -30n + 30n = 0
12 + 21n = 84 + 0
12 + 21n = 84

Add '-12' to each side of the equation.
12 + -12 + 21n = 84 + -12

Combine like terms: 12 + -12 = 0
0 + 21n = 84 + -12
21n = 84 + -12

Combine like terms: 84 + -12 = 72
21n = 72

Divide each side by '21'.
n = 3.428571429

Simplifying
n = 3.428571429

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