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5.1x+-5.1=6.5
We move all terms to the left:
5.1x+-5.1-(6.5)=0
We add all the numbers together, and all the variables
5.1x-11.6=0
We move all terms containing x to the left, all other terms to the right
5.1x=11.6
x=11.6/5.1
x=2+1/3.6428571428571
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