a-12=13

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Solution for a-12=13 equation: 


Simplifying
a + -12 = 13

Reorder the terms:
-12 + a = 13

Solving
-12 + a = 13

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 = 13 + 12

Combine like terms: -12 + 12 = 0
0 + a = 13 + 12
a = 13 + 12

Combine like terms: 13 + 12 = 25
a = 25

Simplifying
a = 25

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