b+a=12

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Solution for b+a=12 equation: 


Simplifying
b + a = 12

Reorder the terms:
a + b = 12

Solving
a + b = 12

Solving for variable 'a'.

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

Add '-1b' to each side of the equation.
a + b + -1b = 12 + -1b

Combine like terms: b + -1b = 0
a + 0 = 12 + -1b
a = 12 + -1b

Simplifying
a = 12 + -1b

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