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30=2-a/6
We move all terms to the left:
30-(2-a/6)=0
We add all the numbers together, and all the variables
-(-a/6+2)+30=0
We get rid of parentheses
a/6-2+30=0
We multiply all the terms by the denominator
a-2*6+30*6=0
We add all the numbers together, and all the variables
a+168=0
We move all terms containing a to the left, all other terms to the right
a=-168
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