a+20=100

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Solution for a+20=100 equation: 


Simplifying
a + 20 = 100

Reorder the terms:
20 + a = 100

Solving
20 + a = 100

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 = 100 + -20

Combine like terms: 20 + -20 = 0
0 + a = 100 + -20
a = 100 + -20

Combine like terms: 100 + -20 = 80
a = 80

Simplifying
a = 80

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