4a+5(0,5a)=390000

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Solution for 4a+5(0,5a)=390000 equation: 



4a+5(0.5a)=390000

We move all terms to the left:

4a+5(0.5a)-(390000)=0

We add all the numbers together, and all the variables

4a+5(+0.5a)-390000=0

We multiply parentheses

4a+0a-390000=0

We add all the numbers together, and all the variables

5a-390000=0

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

5a=390000

a=390000/5

a=78000

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