-21/5=r-4/5

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Solution for -21/5=r-4/5 equation: 



-21/5=r-4/5

We move all terms to the left:

-21/5-(r-4/5)=0

We add all the numbers together, and all the variables

-(+r-4/5)-21/5=0

We get rid of parentheses

-r+4/5-21/5=0

We multiply all the terms by the denominator


-r*5+4-21=0

We add all the numbers together, and all the variables

-r*5-17=0

Wy multiply elements

-5r-17=0

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

-5r=17

r=17/-5

r=-3+2/5

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