-21+5r=6(r-3)

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Solution for -21+5r=6(r-3) equation: 



-21+5r=6(r-3)

We move all terms to the left:

-21+5r-(6(r-3))=0



We calculate terms in parentheses: -(6(r-3)), so:

6(r-3)

We multiply parentheses

6r-18

Back to the equation:

-(6r-18)



We get rid of parentheses

5r-6r+18-21=0

We add all the numbers together, and all the variables

-1r-3=0

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

-r=3

r=3/-1

r=-3

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