2(2a-8)=20

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Solution for 2(2a-8)=20 equation: 



2(2a-8)=20

We move all terms to the left:

2(2a-8)-(20)=0

We multiply parentheses

4a-16-20=0

We add all the numbers together, and all the variables

4a-36=0

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

4a=36

a=36/4

a=9

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