-6x-21=3x-12

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Solution for -6x-21=3x-12 equation:


Simplifying
-6x + -21 = 3x + -12

Reorder the terms:
-21 + -6x = 3x + -12

Reorder the terms:
-21 + -6x = -12 + 3x

Solving
-21 + -6x = -12 + 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.
-21 + -6x + -3x = -12 + 3x + -3x

Combine like terms: -6x + -3x = -9x
-21 + -9x = -12 + 3x + -3x

Combine like terms: 3x + -3x = 0
-21 + -9x = -12 + 0
-21 + -9x = -12

Add '21' to each side of the equation.
-21 + 21 + -9x = -12 + 21

Combine like terms: -21 + 21 = 0
0 + -9x = -12 + 21
-9x = -12 + 21

Combine like terms: -12 + 21 = 9
-9x = 9

Divide each side by '-9'.
x = -1

Simplifying
x = -1

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