0.5a+9=30

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Solution for 0.5a+9=30 equation: 



0.5a+9=30

We move all terms to the left:

0.5a+9-(30)=0

We add all the numbers together, and all the variables

0.5a-21=0

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

0.5a=21

a=21/0.5

a=42

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