43=15+b

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Solution for 43=15+b equation: 



43=15+b

We move all terms to the left:

43-(15+b)=0

We add all the numbers together, and all the variables

-(b+15)+43=0

We get rid of parentheses

-b-15+43=0

We add all the numbers together, and all the variables

-1b+28=0

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

-b=-28

b=-28/-1

b=+28

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