3.9x-9.45=4.2

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Solution for 3.9x-9.45=4.2 equation: 



3.9x-9.45=4.2

We move all terms to the left:

3.9x-9.45-(4.2)=0

We add all the numbers together, and all the variables

3.9x-13.65=0

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

3.9x=13.65

x=13.65/3.9

x=3+1/2

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