18=4+b+7

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Solution for 18=4+b+7 equation: 



18=4+b+7

We move all terms to the left:

18-(4+b+7)=0

We add all the numbers together, and all the variables

-(b+11)+18=0

We get rid of parentheses

-b-11+18=0

We add all the numbers together, and all the variables

-1b+7=0

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

-b=-7

b=-7/-1

b=+7

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