12.9=y+7.1

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Solution for 12.9=y+7.1 equation: 



12.9=y+7.1

We move all terms to the left:

12.9-(y+7.1)=0

We get rid of parentheses

-y-7.1+12.9=0

We add all the numbers together, and all the variables

-1y+5.8=0

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

-y=-5.8

y=-5.8/-1

y=5+0.8/1

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