X+3.5x=9.9

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Solution for X+3.5x=9.9 equation: 



X+3.5X=9.9

We move all terms to the left:

X+3.5X-(9.9)=0

We add all the numbers together, and all the variables

4.5X-9.9=0

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

4.5X=9.9

X=9.9/4.5

X=2+0.9/4.5

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