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7.200+x=13.000
We move all terms to the left:
7.200+x-(13.000)=0
We add all the numbers together, and all the variables
x+7.200-13=0
We add all the numbers together, and all the variables
x-5.8=0
We move all terms containing x to the left, all other terms to the right
x=5.8
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