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1/q+3/q=12
We move all terms to the left:
1/q+3/q-(12)=0
Domain of the equation: q!=0We multiply all the terms by the denominator
q∈R
-12*q+1+3=0
We add all the numbers together, and all the variables
-12q+4=0
We move all terms containing q to the left, all other terms to the right
-12q=-4
q=-4/-12
q=1/3
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