4(9+b)=-4

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Solution for 4(9+b)=-4 equation: 



4(9+b)=-4

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

4(b+9)+4=0

We multiply parentheses

4b+36+4=0

We add all the numbers together, and all the variables

4b+40=0

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

4b=-40

b=-40/4

b=-10

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