a+12=b-18

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Solution for a+12=b-18 equation: 


Simplifying
a + 12 = b + -18

Reorder the terms:
12 + a = b + -18

Reorder the terms:
12 + a = -18 + b

Solving
12 + a = -18 + b

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 + b

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

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

Simplifying
a = -30 + b

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