-10=5(r-1)

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Solution for -10=5(r-1) equation: 



-10=5(r-1)

We move all terms to the left:

-10-(5(r-1))=0



We calculate terms in parentheses: -(5(r-1)), so:

5(r-1)

We multiply parentheses

5r-5

Back to the equation:

-(5r-5)



We get rid of parentheses

-5r+5-10=0

We add all the numbers together, and all the variables

-5r-5=0

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

-5r=5

r=5/-5

r=-1

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