a-20=-16

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Solution for a-20=-16 equation: 


Simplifying
a + -20 = -16

Reorder the terms:
-20 + a = -16

Solving
-20 + a = -16

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 = -16 + 20

Combine like terms: -20 + 20 = 0
0 + a = -16 + 20
a = -16 + 20

Combine like terms: -16 + 20 = 4
a = 4

Simplifying
a = 4

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