2a+8a=30

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Solution for 2a+8a=30 equation: 



2a+8a=30

We move all terms to the left:

2a+8a-(30)=0

We add all the numbers together, and all the variables

10a-30=0

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

10a=30

a=30/10

a=3

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