129-6x=3x+12

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


Simplifying
129 + -6x = 3x + 12

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

Solving
129 + -6x = 12 + 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.
129 + -6x + -3x = 12 + 3x + -3x

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

Combine like terms: 3x + -3x = 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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