b-20=a

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Solution for b-20=a equation: 


Simplifying
b + -20 = a

Reorder the terms:
-20 + b = a

Solving
-20 + b = a

Solving for variable 'b'.

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

Add '20' to each side of the equation.
-20 + 20 + b = 20 + a

Combine like terms: -20 + 20 = 0
0 + b = 20 + a
b = 20 + a

Simplifying
b = 20 + a

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