123-3x=6x+15

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Solution for 123-3x=6x+15 equation:


Simplifying
123 + -3x = 6x + 15

Reorder the terms:
123 + -3x = 15 + 6x

Solving
123 + -3x = 15 + 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.
123 + -3x + -6x = 15 + 6x + -6x

Combine like terms: -3x + -6x = -9x
123 + -9x = 15 + 6x + -6x

Combine like terms: 6x + -6x = 0
123 + -9x = 15 + 0
123 + -9x = 15

Add '-123' to each side of the equation.
123 + -123 + -9x = 15 + -123

Combine like terms: 123 + -123 = 0
0 + -9x = 15 + -123
-9x = 15 + -123

Combine like terms: 15 + -123 = -108
-9x = -108

Divide each side by '-9'.
x = 12

Simplifying
x = 12

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