x+3.9=7.5

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Solution for x+3.9=7.5 equation: 



x+3.9=7.5

We move all terms to the left:

x+3.9-(7.5)=0

We add all the numbers together, and all the variables

x-3.6=0

We move all terms containing x to the left, all other terms to the right

x=3.6

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