-3x=-6x-21

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Solution for -3x=-6x-21 equation: 


Simplifying
-3x = -6x + -21

Reorder the terms:
-3x = -21 + -6x

Solving
-3x = -21 + -6x

Solving for variable 'x'.

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

Add '6x' to each side of the equation.
-3x + 6x = -21 + -6x + 6x

Combine like terms: -3x + 6x = 3x
3x = -21 + -6x + 6x

Combine like terms: -6x + 6x = 0
3x = -21 + 0
3x = -21

Divide each side by '3'.
x = -7

Simplifying
x = -7

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