129-x=15x-207

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Solution for 129-x=15x-207 equation:


Simplifying
129 + -1x = 15x + -207

Reorder the terms:
129 + -1x = -207 + 15x

Solving
129 + -1x = -207 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
129 + -1x + -15x = -207 + 15x + -15x

Combine like terms: -1x + -15x = -16x
129 + -16x = -207 + 15x + -15x

Combine like terms: 15x + -15x = 0
129 + -16x = -207 + 0
129 + -16x = -207

Add '-129' to each side of the equation.
129 + -129 + -16x = -207 + -129

Combine like terms: 129 + -129 = 0
0 + -16x = -207 + -129
-16x = -207 + -129

Combine like terms: -207 + -129 = -336
-16x = -336

Divide each side by '-16'.
x = 21

Simplifying
x = 21

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