20-b=-12

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Solution for 20-b=-12 equation: 



20-b=-12

We move all terms to the left:

20-b-(-12)=0

We add all the numbers together, and all the variables

-1b+32=0

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

-b=-32

b=-32/-1

b=+32

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