a+b=20

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Solution for a+b=20 equation: 


Simplifying
a + b = 20

Solving
a + b = 20

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 = 20 + -1b

Combine like terms: b + -1b = 0
a + 0 = 20 + -1b
a = 20 + -1b

Simplifying
a = 20 + -1b

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