3a-1=2a+6a=7

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Solution for 3a-1=2a+6a=7 equation: 



3a-1=2a+6a=7

We move all terms to the left:

3a-1-(2a+6a)=0

We add all the numbers together, and all the variables

3a-(+8a)-1=0

We get rid of parentheses

3a-8a-1=0

We add all the numbers together, and all the variables

-5a-1=0

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

-5a=1

a=1/-5

a=-1/5

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