4(5r+1)=84

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Solution for 4(5r+1)=84 equation: 



4(5r+1)=84

We move all terms to the left:

4(5r+1)-(84)=0

We multiply parentheses

20r+4-84=0

We add all the numbers together, and all the variables

20r-80=0

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

20r=80

r=80/20

r=4

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