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

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


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

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

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

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

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

Solving for variable 'x'.

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

Add '12x' to each side of the equation.
-6 + -3x + 12x = 21 + -12x + 12x

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

Combine like terms: -12x + 12x = 0
-6 + 9x = 21 + 0
-6 + 9x = 21

Add '6' to each side of the equation.
-6 + 6 + 9x = 21 + 6

Combine like terms: -6 + 6 = 0
0 + 9x = 21 + 6
9x = 21 + 6

Combine like terms: 21 + 6 = 27
9x = 27

Divide each side by '9'.
x = 3

Simplifying
x = 3

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