a-1=11

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Solution for a-1=11 equation: 


Simplifying
a + -1 = 11

Reorder the terms:
-1 + a = 11

Solving
-1 + a = 11

Solving for variable 'a'.

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

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

Combine like terms: -1 + 1 = 0
0 + a = 11 + 1
a = 11 + 1

Combine like terms: 11 + 1 = 12
a = 12

Simplifying
a = 12

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