7/8r=21

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Solution for 7/8r=21 equation: 



7/8r=21

We move all terms to the left:

7/8r-(21)=0



Domain of the equation: 8r!=0

r!=0/8

r!=0

r∈R



We multiply all the terms by the denominator


-21*8r+7=0

Wy multiply elements

-168r+7=0

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

-168r=-7

r=-7/-168

r=1/24

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