-3y-9y+5y=2,1

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Solution for -3y-9y+5y=2,1 equation: 



-3y-9y+5y=2.1

We move all terms to the left:

-3y-9y+5y-(2.1)=0

We add all the numbers together, and all the variables

-7y-2.1=0

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

-7y=2.1

y=2.1/-7

y=-2.1/7

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