10(r+5)=80

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Solution for 10(r+5)=80 equation: 



10(r+5)=80

We move all terms to the left:

10(r+5)-(80)=0

We multiply parentheses

10r+50-80=0

We add all the numbers together, and all the variables

10r-30=0

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

10r=30

r=30/10

r=3

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