a+13=-12

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Solution for a+13=-12 equation: 


Simplifying
a + 13 = -12

Reorder the terms:
13 + a = -12

Solving
13 + a = -12

Solving for variable 'a'.

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

Add '-13' to each side of the equation.
13 + -13 + a = -12 + -13

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

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

Simplifying
a = -25

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