x+3=-3x-9

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


Simplifying
x + 3 = -3x + -9

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

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

Solving
3 + x = -9 + -3x

Solving for variable 'x'.

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

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

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

Combine like terms: -3x + 3x = 0
3 + 4x = -9 + 0
3 + 4x = -9

Add '-3' to each side of the equation.
3 + -3 + 4x = -9 + -3

Combine like terms: 3 + -3 = 0
0 + 4x = -9 + -3
4x = -9 + -3

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

Divide each side by '4'.
x = -3

Simplifying
x = -3

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