31=(y+30)+y

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Solution for 31=(y+30)+y equation: 



31=(y+30)+y

We move all terms to the left:

31-((y+30)+y)=0



We calculate terms in parentheses: -((y+30)+y), so:

(y+30)+y

We add all the numbers together, and all the variables

y+(y+30)

We get rid of parentheses

y+y+30

We add all the numbers together, and all the variables

2y+30

Back to the equation:

-(2y+30)



We get rid of parentheses

-2y-30+31=0

We add all the numbers together, and all the variables

-2y+1=0

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

-2y=-1

y=-1/-2

y=1/2

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