-9x=-2x-21

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Solution for -9x=-2x-21 equation: 


Simplifying
-9x = -2x + -21

Reorder the terms:
-9x = -21 + -2x

Solving
-9x = -21 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
-9x + 2x = -21 + -2x + 2x

Combine like terms: -9x + 2x = -7x
-7x = -21 + -2x + 2x

Combine like terms: -2x + 2x = 0
-7x = -21 + 0
-7x = -21

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

Simplifying
x = 3

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