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8.4q-17.76=12.9
We move all terms to the left:
8.4q-17.76-(12.9)=0
We add all the numbers together, and all the variables
8.4q-30.66=0
We move all terms containing q to the left, all other terms to the right
8.4q=30.66
q=30.66/8.4
q=3+3.7397260274/5.75342465753
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