3x+12=-84-9x

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Solution for 3x+12=-84-9x equation:


Simplifying
3x + 12 = -84 + -9x

Reorder the terms:
12 + 3x = -84 + -9x

Solving
12 + 3x = -84 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
12 + 3x + 9x = -84 + -9x + 9x

Combine like terms: 3x + 9x = 12x
12 + 12x = -84 + -9x + 9x

Combine like terms: -9x + 9x = 0
12 + 12x = -84 + 0
12 + 12x = -84

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

Combine like terms: 12 + -12 = 0
0 + 12x = -84 + -12
12x = -84 + -12

Combine like terms: -84 + -12 = -96
12x = -96

Divide each side by '12'.
x = -8

Simplifying
x = -8

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