7b+21=28b+14

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Solution for 7b+21=28b+14 equation: 



7b+21=28b+14

We move all terms to the left:

7b+21-(28b+14)=0

We get rid of parentheses

7b-28b-14+21=0

We add all the numbers together, and all the variables

-21b+7=0

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

-21b=-7

b=-7/-21

b=1/3

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