12-a=11

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Solution for 12-a=11 equation: 


Simplifying
12 + -1a = 11

Solving
12 + -1a = 11

Solving for variable 'a'.

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

Add '-12' to each side of the equation.
12 + -12 + -1a = 11 + -12

Combine like terms: 12 + -12 = 0
0 + -1a = 11 + -12
-1a = 11 + -12

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

Divide each side by '-1'.
a = 1

Simplifying
a = 1

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