4=-30+b

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Solution for 4=-30+b equation: 



4=-30+b

We move all terms to the left:

4-(-30+b)=0

We add all the numbers together, and all the variables

-(b-30)+4=0

We get rid of parentheses

-b+30+4=0

We add all the numbers together, and all the variables

-1b+34=0

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

-b=-34

b=-34/-1

b=+34

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