2y-9=12.90

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Solution for 2y-9=12.90 equation: 



2y-9=12.90

We move all terms to the left:

2y-9-(12.90)=0

We add all the numbers together, and all the variables

2y-9-(12.9)=0

We add all the numbers together, and all the variables

2y-21.9=0

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

2y=21.9

y=21.9/2

y=10+1/1.05263157895

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