4+8a=20

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Solution for 4+8a=20 equation: 



4+8a=20

We move all terms to the left:

4+8a-(20)=0

We add all the numbers together, and all the variables

8a-16=0

We move all terms containing a to the left, all other terms to the right

8a=16

a=16/8

a=2

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