-2y=9+y

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Solution for -2y=9+y equation: 


Simplifying
-2y = 9 + y

Solving
-2y = 9 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-2y + -1y = 9 + y + -1y

Combine like terms: -2y + -1y = -3y
-3y = 9 + y + -1y

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

Divide each side by '-3'.
y = -3

Simplifying
y = -3

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