-21x*3x=

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Solution for -21x*3x= equation: 


Simplifying
-21x * 3x = 0

Reorder the terms for easier multiplication:
-21 * 3x * x = 0

Multiply -21 * 3
-63x * x = 0

Multiply x * x
-63x2 = 0

Solving
-63x2 = 0

Solving for variable 'x'.

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

Divide each side by '-63'.
x2 = 0

Simplifying
x2 = 0

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

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