7a-3.9a=6-2

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Solution for 7a-3.9a=6-2 equation: 



7a-3.9a=6-2

We move all terms to the left:

7a-3.9a-(6-2)=0

We add all the numbers together, and all the variables

7a-3.9a-4=0

We add all the numbers together, and all the variables

3.1a-4=0

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

3.1a=4

a=4/3.1

a=1+0.9/3.1

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