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-8(1+6a)=-392
We move all terms to the left:
-8(1+6a)-(-392)=0
We add all the numbers together, and all the variables
-8(6a+1)-(-392)=0
We add all the numbers together, and all the variables
-8(6a+1)+392=0
We multiply parentheses
-48a-8+392=0
We add all the numbers together, and all the variables
-48a+384=0
We move all terms containing a to the left, all other terms to the right
-48a=-384
a=-384/-48
a=+8
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