21+12b=25

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Solution for 21+12b=25 equation: 



21+12b=25

We move all terms to the left:

21+12b-(25)=0

We add all the numbers together, and all the variables

12b-4=0

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

12b=4

b=4/12

b=1/3

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