270=30-y

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Solution for 270=30-y equation: 



270=30-y

We move all terms to the left:

270-(30-y)=0

We add all the numbers together, and all the variables

-(-1y+30)+270=0

We get rid of parentheses

1y-30+270=0

We add all the numbers together, and all the variables

y+240=0

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

y=-240

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