12x-3x+4=-16

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Solution for 12x-3x+4=-16 equation: 


Simplifying
12x + -3x + 4 = -16

Reorder the terms:
4 + 12x + -3x = -16

Combine like terms: 12x + -3x = 9x
4 + 9x = -16

Solving
4 + 9x = -16

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 9x = -16 + -4

Combine like terms: 4 + -4 = 0
0 + 9x = -16 + -4
9x = -16 + -4

Combine like terms: -16 + -4 = -20
9x = -20

Divide each side by '9'.
x = -2.222222222

Simplifying
x = -2.222222222

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