-5(r-1)=40

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Solution for -5(r-1)=40 equation: 



-5(r-1)=40

We move all terms to the left:

-5(r-1)-(40)=0

We multiply parentheses

-5r+5-40=0

We add all the numbers together, and all the variables

-5r-35=0

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

-5r=35

r=35/-5

r=-7

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