X+2y=31.90

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Solution for X+2y=31.90 equation: 



X+2X=31.90

We move all terms to the left:

X+2X-(31.90)=0

We add all the numbers together, and all the variables

X+2X-(31.9)=0

We add all the numbers together, and all the variables

3X-31.9=0

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

3X=31.9

X=31.9/3

X=10+1/1.5789473684211

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