9/2b+12=21

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Solution for 9/2b+12=21 equation: 



9/2b+12=21

We move all terms to the left:

9/2b+12-(21)=0



Domain of the equation: 2b!=0

b!=0/2

b!=0

b∈R



We add all the numbers together, and all the variables

9/2b-9=0

We multiply all the terms by the denominator


-9*2b+9=0

Wy multiply elements

-18b+9=0

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

-18b=-9

b=-9/-18

b=1/2

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