7b+8+5b=-3b+13

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Solution for 7b+8+5b=-3b+13 equation: 



7b+8+5b=-3b+13

We move all terms to the left:

7b+8+5b-(-3b+13)=0

We add all the numbers together, and all the variables

12b-(-3b+13)+8=0

We get rid of parentheses

12b+3b-13+8=0

We add all the numbers together, and all the variables

15b-5=0

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

15b=5

b=5/15

b=1/3

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