-6+a=12

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Solution for -6+a=12 equation: 


Simplifying
-6 + a = 12

Solving
-6 + a = 12

Solving for variable 'a'.

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

Add '6' to each side of the equation.
-6 + 6 + a = 12 + 6

Combine like terms: -6 + 6 = 0
0 + a = 12 + 6
a = 12 + 6

Combine like terms: 12 + 6 = 18
a = 18

Simplifying
a = 18

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