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3.9q-5.8-4.2q=-1.3q-1.3
We move all terms to the left:
3.9q-5.8-4.2q-(-1.3q-1.3)=0
We add all the numbers together, and all the variables
-0.3q-(-1.3q-1.3)-5.8=0
We get rid of parentheses
-0.3q+1.3q+1.3-5.8=0
We add all the numbers together, and all the variables
q-4.5=0
We move all terms containing q to the left, all other terms to the right
q=4.5
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