8.6x-3.9=21.9

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Solution for 8.6x-3.9=21.9 equation: 



8.6x-3.9=21.9

We move all terms to the left:

8.6x-3.9-(21.9)=0

We add all the numbers together, and all the variables

8.6x-25.8=0

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

8.6x=25.8

x=25.8/8.6

x=3+3.5527136788005E-15/8.6

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