3x-12=9-3x

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Solution for 3x-12=9-3x equation:


Simplifying
3x + -12 = 9 + -3x

Reorder the terms:
-12 + 3x = 9 + -3x

Solving
-12 + 3x = 9 + -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 + 3x + 3x = 9 + -3x + 3x

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

Combine like terms: -3x + 3x = 0
-12 + 6x = 9 + 0
-12 + 6x = 9

Add '12' to each side of the equation.
-12 + 12 + 6x = 9 + 12

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

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

Divide each side by '6'.
x = 3.5

Simplifying
x = 3.5

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