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3q=1/81
We move all terms to the left:
3q-(1/81)=0
We add all the numbers together, and all the variables
3q-(+1/81)=0
We get rid of parentheses
3q-1/81=0
We multiply all the terms by the denominator
3q*81-1=0
Wy multiply elements
243q-1=0
We move all terms containing q to the left, all other terms to the right
243q=1
q=1/243
q=1/243
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