15x-129=6x-12

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Solution for 15x-129=6x-12 equation:


Simplifying
15x + -129 = 6x + -12

Reorder the terms:
-129 + 15x = 6x + -12

Reorder the terms:
-129 + 15x = -12 + 6x

Solving
-129 + 15x = -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 + 15x + -6x = -12 + 6x + -6x

Combine like terms: 15x + -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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