6x-12=-3x-21

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


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

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

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

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

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

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

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

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

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

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

Simplifying
x = -1

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