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5.20+1.30x=13
We move all terms to the left:
5.20+1.30x-(13)=0
We add all the numbers together, and all the variables
1.30x-7.8=0
We move all terms containing x to the left, all other terms to the right
1.30x=7.8
x=7.8/1.30
x=6+-8.8817841970013E-16/1.30
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