10(r-91)=20

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Solution for 10(r-91)=20 equation: 



10(r-91)=20

We move all terms to the left:

10(r-91)-(20)=0

We multiply parentheses

10r-910-20=0

We add all the numbers together, and all the variables

10r-930=0

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

10r=930

r=930/10

r=93

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