3(3b+7)=-2(4-b)

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Solution for 3(3b+7)=-2(4-b) equation: 



3(3b+7)=-2(4-b)

We move all terms to the left:

3(3b+7)-(-2(4-b))=0

We add all the numbers together, and all the variables

3(3b+7)-(-2(-1b+4))=0

We multiply parentheses

9b-(-2(-1b+4))+21=0



We calculate terms in parentheses: -(-2(-1b+4)), so:

-2(-1b+4)

We multiply parentheses

2b-8

Back to the equation:

-(2b-8)



We get rid of parentheses

9b-2b+8+21=0

We add all the numbers together, and all the variables

7b+29=0

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

7b=-29

b=-29/7

b=-4+1/7

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