21x=-12x

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Solution for 21x=-12x equation: 


Simplifying
21x = -12x

Solving
21x = -12x

Solving for variable 'x'.

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

Add '12x' to each side of the equation.
21x + 12x = -12x + 12x

Combine like terms: 21x + 12x = 33x
33x = -12x + 12x

Combine like terms: -12x + 12x = 0
33x = 0

Divide each side by '33'.
x = 0

Simplifying
x = 0

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