3.9x-8.4=18.9

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Solution for 3.9x-8.4=18.9 equation: 



3.9x-8.4=18.9

We move all terms to the left:

3.9x-8.4-(18.9)=0

We add all the numbers together, and all the variables

3.9x-27.3=0

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

3.9x=27.3

x=27.3/3.9

x=7

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