-3x(x+3x)=

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


Simplifying
-3x(x + 3x) = 0

Combine like terms: x + 3x = 4x
-3x(4x) = 0

Remove parenthesis around (4x)
-3x * 4x = 0

Reorder the terms for easier multiplication:
-3 * 4x * x = 0

Multiply -3 * 4
-12x * x = 0

Multiply x * x
-12x2 = 0

Solving
-12x2 = 0

Solving for variable 'x'.

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

Divide each side by '-12'.
x2 = 0

Simplifying
x2 = 0

Take the square root of each side:
x = {0}

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