[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]

Remove brackets around [-12 + 6x]
-12 + 6x = [-3x + -21]

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

Remove brackets around [-21 + -3x]
-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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