129-3x=6x+12

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Solution for 129-3x=6x+12 equation:


Simplifying
129 + -3x = 6x + 12

Reorder the terms:
129 + -3x = 12 + 6x

Solving
129 + -3x = 12 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
129 + -3x + -6x = 12 + 6x + -6x

Combine like terms: -3x + -6x = -9x
129 + -9x = 12 + 6x + -6x

Combine like terms: 6x + -6x = 0
129 + -9x = 12 + 0
129 + -9x = 12

Add '-129' to each side of the equation.
129 + -129 + -9x = 12 + -129

Combine like terms: 129 + -129 = 0
0 + -9x = 12 + -129
-9x = 12 + -129

Combine like terms: 12 + -129 = -117
-9x = -117

Divide each side by '-9'.
x = 13

Simplifying
x = 13

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