15=b+3b=

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Solution for 15=b+3b= equation: 



15=b+3b=

We move all terms to the left:

15-(b+3b)=0

We add all the numbers together, and all the variables

-(+4b)+15=0

We get rid of parentheses

-4b+15=0

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

-4b=-15

b=-15/-4

b=3+3/4

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