(17+y)+y=-1

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Solution for (17+y)+y=-1 equation: 



(17+y)+y=-1

We move all terms to the left:

(17+y)+y-(-1)=0

We add all the numbers together, and all the variables

(y+17)+y-(-1)=0

We add all the numbers together, and all the variables

y+(y+17)+1=0

We get rid of parentheses

y+y+17+1=0

We add all the numbers together, and all the variables

2y+18=0

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

2y=-18

y=-18/2

y=-9

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