20b+11=13b+15

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Solution for 20b+11=13b+15 equation: 



20b+11=13b+15

We move all terms to the left:

20b+11-(13b+15)=0

We get rid of parentheses

20b-13b-15+11=0

We add all the numbers together, and all the variables

7b-4=0

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

7b=4

b=4/7

b=4/7

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