2(2a+4)=20

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Solution for 2(2a+4)=20 equation: 



2(2a+4)=20

We move all terms to the left:

2(2a+4)-(20)=0

We multiply parentheses

4a+8-20=0

We add all the numbers together, and all the variables

4a-12=0

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

4a=12

a=12/4

a=3

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