10b+2b=7b-15

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Solution for 10b+2b=7b-15 equation: 



10b+2b=7b-15

We move all terms to the left:

10b+2b-(7b-15)=0

We add all the numbers together, and all the variables

12b-(7b-15)=0

We get rid of parentheses

12b-7b+15=0

We add all the numbers together, and all the variables

5b+15=0

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

5b=-15

b=-15/5

b=-3

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