4+5=-(7-4b)

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Solution for 4+5=-(7-4b) equation: 



4+5=-(7-4b)

We move all terms to the left:

4+5-(-(7-4b))=0

We add all the numbers together, and all the variables

-(-(-4b+7))+4+5=0

We add all the numbers together, and all the variables

-(-(-4b+7))+9=0



We calculate terms in parentheses: -(-(-4b+7)), so:

-(-4b+7)

We get rid of parentheses

4b-7

Back to the equation:

-(4b-7)



We get rid of parentheses

-4b+7+9=0

We add all the numbers together, and all the variables

-4b+16=0

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

-4b=-16

b=-16/-4

b=+4

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