21+7/8r=-21

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Solution for 21+7/8r=-21 equation: 



21+7/8r=-21

We move all terms to the left:

21+7/8r-(-21)=0



Domain of the equation: 8r!=0

r!=0/8

r!=0

r∈R



We add all the numbers together, and all the variables

7/8r+42=0

We multiply all the terms by the denominator


42*8r+7=0

Wy multiply elements

336r+7=0

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

336r=-7

r=-7/336

r=-1/48

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