16+a=20

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Solution for 16+a=20 equation: 


Simplifying
16 + a = 20

Solving
16 + a = 20

Solving for variable 'a'.

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

Add '-16' to each side of the equation.
16 + -16 + a = 20 + -16

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

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

Simplifying
a = 4

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