21+7/4r=-21

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Solution for 21+7/4r=-21 equation: 



21+7/4r=-21

We move all terms to the left:

21+7/4r-(-21)=0



Domain of the equation: 4r!=0

r!=0/4

r!=0

r∈R



We add all the numbers together, and all the variables

7/4r+42=0

We multiply all the terms by the denominator


42*4r+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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