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5-3(a+6)=a-1+81
We move all terms to the left:
5-3(a+6)-(a-1+81)=0
We add all the numbers together, and all the variables
-3(a+6)-(a+80)+5=0
We multiply parentheses
-3a-(a+80)-18+5=0
We get rid of parentheses
-3a-a-80-18+5=0
We add all the numbers together, and all the variables
-4a-93=0
We move all terms containing a to the left, all other terms to the right
-4a=93
a=93/-4
a=-23+1/4
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