129-3x=5x+9

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Solution for 129-3x=5x+9 equation:


Simplifying
129 + -3x = 5x + 9

Reorder the terms:
129 + -3x = 9 + 5x

Solving
129 + -3x = 9 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
129 + -3x + -5x = 9 + 5x + -5x

Combine like terms: -3x + -5x = -8x
129 + -8x = 9 + 5x + -5x

Combine like terms: 5x + -5x = 0
129 + -8x = 9 + 0
129 + -8x = 9

Add '-129' to each side of the equation.
129 + -129 + -8x = 9 + -129

Combine like terms: 129 + -129 = 0
0 + -8x = 9 + -129
-8x = 9 + -129

Combine like terms: 9 + -129 = -120
-8x = -120

Divide each side by '-8'.
x = 15

Simplifying
x = 15

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