8b+69=20b-87

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Solution for 8b+69=20b-87 equation: 



8b+69=20b-87

We move all terms to the left:

8b+69-(20b-87)=0

We get rid of parentheses

8b-20b+87+69=0

We add all the numbers together, and all the variables

-12b+156=0

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

-12b=-156

b=-156/-12

b=+13

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