20-12=45b-4

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Solution for 20-12=45b-4 equation: 



20-12=45b-4

We move all terms to the left:

20-12-(45b-4)=0

We add all the numbers together, and all the variables

-(45b-4)+8=0

We get rid of parentheses

-45b+4+8=0

We add all the numbers together, and all the variables

-45b+12=0

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

-45b=-12

b=-12/-45

b=4/15

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