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5.2x-8.4=7.2
We move all terms to the left:
5.2x-8.4-(7.2)=0
We add all the numbers together, and all the variables
5.2x-15.6=0
We move all terms containing x to the left, all other terms to the right
5.2x=15.6
x=15.6/5.2
x=3+-1.7763568394003E-15/5.2
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