3a-1=3+7

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



3a-1=3+7

We move all terms to the left:

3a-1-(3+7)=0

We add all the numbers together, and all the variables

3a-1-10=0

We add all the numbers together, and all the variables

3a-11=0

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

3a=11

a=11/3

a=3+2/3

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