-7=b+-15

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Solution for -7=b+-15 equation: 



-7=b+-15

We move all terms to the left:

-7-(b+-15)=0

We add all the numbers together, and all the variables

-(b-15)-7=0

We get rid of parentheses

-b+15-7=0

We add all the numbers together, and all the variables

-1b+8=0

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

-b=-8

b=-8/-1

b=+8

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