-10=-2(b+-3)

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Solution for -10=-2(b+-3) equation: 



-10=-2(b+-3)

We move all terms to the left:

-10-(-2(b+-3))=0

We add all the numbers together, and all the variables

-(-2(b-3))-10=0



We calculate terms in parentheses: -(-2(b-3)), so:

-2(b-3)

We multiply parentheses

-2b+6

Back to the equation:

-(-2b+6)



We get rid of parentheses

2b-6-10=0

We add all the numbers together, and all the variables

2b-16=0

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

2b=16

b=16/2

b=8

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