X+3=-4x-12

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


Simplifying
X + 3 = -4x + -12

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

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

Solving
3 + X = -12 + -4x

Solving for variable 'X'.

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

Add '-3' to each side of the equation.
3 + -3 + X = -12 + -3 + -4x

Combine like terms: 3 + -3 = 0
0 + X = -12 + -3 + -4x
X = -12 + -3 + -4x

Combine like terms: -12 + -3 = -15
X = -15 + -4x

Simplifying
X = -15 + -4x

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