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5.1x-8.4=17.1
We move all terms to the left:
5.1x-8.4-(17.1)=0
We add all the numbers together, and all the variables
5.1x-25.5=0
We move all terms containing x to the left, all other terms to the right
5.1x=25.5
x=25.5/5.1
x=5
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