a-20=b

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Solution for a-20=b equation: 


Simplifying
a + -20 = b

Reorder the terms:
-20 + a = b

Solving
-20 + a = b

Solving for variable 'a'.

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

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

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

Simplifying
a = 20 + b

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