12=-3(x+9)

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Solution for 12=-3(x+9) equation: 


Simplifying
12 = -3(x + 9)

Reorder the terms:
12 = -3(9 + x)
12 = (9 * -3 + x * -3)
12 = (-27 + -3x)

Solving
12 = -27 + -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.
12 + 3x = -27 + -3x + 3x

Combine like terms: -3x + 3x = 0
12 + 3x = -27 + 0
12 + 3x = -27

Add '-12' to each side of the equation.
12 + -12 + 3x = -27 + -12

Combine like terms: 12 + -12 = 0
0 + 3x = -27 + -12
3x = -27 + -12

Combine like terms: -27 + -12 = -39
3x = -39

Divide each side by '3'.
x = -13

Simplifying
x = -13

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