-84x*21x=

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Solution for -84x*21x= equation: 


Simplifying
-84x * 21x = 0

Reorder the terms for easier multiplication:
-84 * 21x * x = 0

Multiply -84 * 21
-1764x * x = 0

Multiply x * x
-1764x2 = 0

Solving
-1764x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1764'.
x2 = 0

Simplifying
x2 = 0

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

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