9x-12x=31-19

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Solution for 9x-12x=31-19 equation: 


Simplifying
9x + -12x = 31 + -19

Combine like terms: 9x + -12x = -3x
-3x = 31 + -19

Combine like terms: 31 + -19 = 12
-3x = 12

Solving
-3x = 12

Solving for variable 'x'.

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

Divide each side by '-3'.
x = -4

Simplifying
x = -4

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