3.9=-0.65(b+8)

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Solution for 3.9=-0.65(b+8) equation: 



3.9=-0.65(b+8)

We move all terms to the left:

3.9-(-0.65(b+8))=0



We calculate terms in parentheses: -(-0.65(b+8)), so:

-0.65(b+8)

We multiply parentheses

-0.65b-5.2

Back to the equation:

-(-0.65b-5.2)



We get rid of parentheses

0.65b+5.2+3.9=0

We add all the numbers together, and all the variables

0.65b+9.1=0

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

0.65b=-9.1

b=-9.1/0.65

b=-13+0.65/0.65

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