2(3+a)=30

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Solution for 2(3+a)=30 equation: 



2(3+a)=30

We move all terms to the left:

2(3+a)-(30)=0

We add all the numbers together, and all the variables

2(a+3)-30=0

We multiply parentheses

2a+6-30=0

We add all the numbers together, and all the variables

2a-24=0

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

2a=24

a=24/2

a=12

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