r-5=21/8

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Solution for r-5=21/8 equation: 



r-5=21/8

We move all terms to the left:

r-5-(21/8)=0

We add all the numbers together, and all the variables

r-5-(+21/8)=0

We get rid of parentheses

r-5-21/8=0

We multiply all the terms by the denominator


r*8-21-5*8=0

We add all the numbers together, and all the variables

r*8-61=0

Wy multiply elements

8r-61=0

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

8r=61

r=61/8

r=7+5/8

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