12b-18=8+13b-9

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Solution for 12b-18=8+13b-9 equation: 



12b-18=8+13b-9

We move all terms to the left:

12b-18-(8+13b-9)=0

We add all the numbers together, and all the variables

12b-(13b-1)-18=0

We get rid of parentheses

12b-13b+1-18=0

We add all the numbers together, and all the variables

-1b-17=0

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

-b=17

b=17/-1

b=-17

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