30=4+b

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Solution for 30=4+b equation: 



30=4+b

We move all terms to the left:

30-(4+b)=0

We add all the numbers together, and all the variables

-(b+4)+30=0

We get rid of parentheses

-b-4+30=0

We add all the numbers together, and all the variables

-1b+26=0

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

-b=-26

b=-26/-1

b=+26

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