211=121-y

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Solution for 211=121-y equation: 



211=121-y

We move all terms to the left:

211-(121-y)=0

We add all the numbers together, and all the variables

-(-1y+121)+211=0

We get rid of parentheses

1y-121+211=0

We add all the numbers together, and all the variables

y+90=0

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

y=-90

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