7b-4+5b=9-1b

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Solution for 7b-4+5b=9-1b equation: 



7b-4+5b=9-1b

We move all terms to the left:

7b-4+5b-(9-1b)=0

We add all the numbers together, and all the variables

7b+5b-(-1b+9)-4=0

We add all the numbers together, and all the variables

12b-(-1b+9)-4=0

We get rid of parentheses

12b+1b-9-4=0

We add all the numbers together, and all the variables

13b-13=0

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

13b=13

b=13/13

b=1

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