2.2=7.9+y

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Solution for 2.2=7.9+y equation: 



2.2=7.9+y

We move all terms to the left:

2.2-(7.9+y)=0

We add all the numbers together, and all the variables

-(y+7.9)+2.2=0

We get rid of parentheses

-y-7.9+2.2=0

We add all the numbers together, and all the variables

-1y-5.7=0

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

-y=5.7

y=5.7/-1

y=-5+0.7/1

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