2(5r-5)=40

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Solution for 2(5r-5)=40 equation: 



2(5r-5)=40

We move all terms to the left:

2(5r-5)-(40)=0

We multiply parentheses

10r-10-40=0

We add all the numbers together, and all the variables

10r-50=0

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

10r=50

r=50/10

r=5

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