a-0,4a=30

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Solution for a-0,4a=30 equation: 



a-0.4a=30

We move all terms to the left:

a-0.4a-(30)=0

We add all the numbers together, and all the variables

0.6a-30=0

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

0.6a=30

a=30/0.6

a=50

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