270=300+-7.5y

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Solution for 270=300+-7.5y equation: 



270=300+-7.5y

We move all terms to the left:

270-(300+-7.5y)=0

We add all the numbers together, and all the variables

-(-7.5y)+270=0

We get rid of parentheses

7.5y+270=0

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

7.5y=-270

y=-270/7.5

y=-36

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