2X+y=3.9

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Solution for 2X+y=3.9 equation:



2X+X=3.9
We move all terms to the left:
2X+X-(3.9)=0
We add all the numbers together, and all the variables
3X-3.9=0
We move all terms containing X to the left, all other terms to the right
3X=3.9
X=3.9/3
X=1+0.9/3

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