11=y-9

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Solution for 11=y-9 equation: 


Simplifying
11 = y + -9

Reorder the terms:
11 = -9 + y

Solving
11 = -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.
11 + -1y = -9 + y + -1y

Combine like terms: y + -1y = 0
11 + -1y = -9 + 0
11 + -1y = -9

Add '-11' to each side of the equation.
11 + -11 + -1y = -9 + -11

Combine like terms: 11 + -11 = 0
0 + -1y = -9 + -11
-1y = -9 + -11

Combine like terms: -9 + -11 = -20
-1y = -20

Divide each side by '-1'.
y = 20

Simplifying
y = 20

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