3x-9=-3y

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Solution for 3x-9=-3y equation: 


Simplifying
3x + -9 = -3y

Reorder the terms:
-9 + 3x = -3y

Solving
-9 + 3x = -3y

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 3x = 9 + -3y

Combine like terms: -9 + 9 = 0
0 + 3x = 9 + -3y
3x = 9 + -3y

Divide each side by '3'.
x = 3 + -1y

Simplifying
x = 3 + -1y

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