9=3y-x

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Solution for 9=3y-x equation: 


Simplifying
9 = 3y + -1x

Reorder the terms:
9 = -1x + 3y

Solving
9 = -1x + 3y

Solving for variable 'x'.

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

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

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

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

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

Simplifying
x = -9 + 3y

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