-9+a=11

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Solution for -9+a=11 equation: 


Simplifying
-9 + a = 11

Solving
-9 + a = 11

Solving for variable 'a'.

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

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

Combine like terms: -9 + 9 = 0
0 + a = 11 + 9
a = 11 + 9

Combine like terms: 11 + 9 = 20
a = 20

Simplifying
a = 20

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