3n+12=72-9n

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Solution for 3n+12=72-9n equation:


Simplifying
3n + 12 = 72 + -9n

Reorder the terms:
12 + 3n = 72 + -9n

Solving
12 + 3n = 72 + -9n

Solving for variable 'n'.

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

Add '9n' to each side of the equation.
12 + 3n + 9n = 72 + -9n + 9n

Combine like terms: 3n + 9n = 12n
12 + 12n = 72 + -9n + 9n

Combine like terms: -9n + 9n = 0
12 + 12n = 72 + 0
12 + 12n = 72

Add '-12' to each side of the equation.
12 + -12 + 12n = 72 + -12

Combine like terms: 12 + -12 = 0
0 + 12n = 72 + -12
12n = 72 + -12

Combine like terms: 72 + -12 = 60
12n = 60

Divide each side by '12'.
n = 5

Simplifying
n = 5

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