-20b=-40

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Solution for -20b=-40 equation: 



-20b=-40

We move all terms to the left:

-20b-(-40)=0

We add all the numbers together, and all the variables

-20b+40=0

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

-20b=-40

b=-40/-20

b=+2

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