1/2b+3/2b+7=21

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Solution for 1/2b+3/2b+7=21 equation: 



1/2b+3/2b+7=21

We move all terms to the left:

1/2b+3/2b+7-(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

1/2b+3/2b-14=0

We multiply all the terms by the denominator


-14*2b+1+3=0

We add all the numbers together, and all the variables

-14*2b+4=0

Wy multiply elements

-28b+4=0

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

-28b=-4

b=-4/-28

b=1/7

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