-y-3x=12

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Solution for -y-3x=12 equation: 


Simplifying
-1y + -3x = 12

Reorder the terms:
-3x + -1y = 12

Solving
-3x + -1y = 12

Solving for variable 'x'.

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

Add 'y' to each side of the equation.
-3x + -1y + y = 12 + y

Combine like terms: -1y + y = 0
-3x + 0 = 12 + y
-3x = 12 + y

Divide each side by '-3'.
x = -4 + -0.3333333333y

Simplifying
x = -4 + -0.3333333333y

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