12=3x+4*-9

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Solution for 12=3x+4*-9 equation: 


Simplifying
12 = 3x + 4 * -9

Multiply 4 * -9
12 = 3x + -36

Reorder the terms:
12 = -36 + 3x

Solving
12 = -36 + 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 = -36 + 3x + -3x

Combine like terms: 3x + -3x = 0
12 + -3x = -36 + 0
12 + -3x = -36

Add '-12' to each side of the equation.
12 + -12 + -3x = -36 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = -36 + -12
-3x = -36 + -12

Combine like terms: -36 + -12 = -48
-3x = -48

Divide each side by '-3'.
x = 16

Simplifying
x = 16

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