21b-15+6=32b-64

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Solution for 21b-15+6=32b-64 equation: 



21b-15+6=32b-64

We move all terms to the left:

21b-15+6-(32b-64)=0

We add all the numbers together, and all the variables

21b-(32b-64)-9=0

We get rid of parentheses

21b-32b+64-9=0

We add all the numbers together, and all the variables

-11b+55=0

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

-11b=-55

b=-55/-11

b=+5

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