10(r-2)=40

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Solution for 10(r-2)=40 equation: 



10(r-2)=40

We move all terms to the left:

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

We multiply parentheses

10r-20-40=0

We add all the numbers together, and all the variables

10r-60=0

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

10r=60

r=60/10

r=6

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