12x-6x-7x=9

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Solution for 12x-6x-7x=9 equation: 


Simplifying
12x + -6x + -7x = 9

Combine like terms: 12x + -6x = 6x
6x + -7x = 9

Combine like terms: 6x + -7x = -1x
-1x = 9

Solving
-1x = 9

Solving for variable 'x'.

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

Divide each side by '-1'.
x = -9

Simplifying
x = -9

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