171=30-y

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Solution for 171=30-y equation: 



171=30-y

We move all terms to the left:

171-(30-y)=0

We add all the numbers together, and all the variables

-(-1y+30)+171=0

We get rid of parentheses

1y-30+171=0

We add all the numbers together, and all the variables

y+141=0

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

y=-141

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