-6x=-3x-21

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


Simplifying
-6x = -3x + -21

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

Solving
-6x = -21 + -3x

Solving for variable 'x'.

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

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

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

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

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

Simplifying
x = 7

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