9-2y=a

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Solution for 9-2y=a equation: 


Simplifying
9 + -2y = a

Solving
9 + -2y = a

Solving for variable 'y'.

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

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

Combine like terms: 9 + -9 = 0
0 + -2y = -9 + a
-2y = -9 + a

Divide each side by '-2'.
y = 4.5 + -0.5a

Simplifying
y = 4.5 + -0.5a

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