a-12=18

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Solution for a-12=18 equation: 


Simplifying
a + -12 = 18

Reorder the terms:
-12 + a = 18

Solving
-12 + a = 18

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 + a = 18 + 12

Combine like terms: -12 + 12 = 0
0 + a = 18 + 12
a = 18 + 12

Combine like terms: 18 + 12 = 30
a = 30

Simplifying
a = 30

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