2(r-27)=100

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Solution for 2(r-27)=100 equation: 



2(r-27)=100

We move all terms to the left:

2(r-27)-(100)=0

We multiply parentheses

2r-54-100=0

We add all the numbers together, and all the variables

2r-154=0

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

2r=154

r=154/2

r=77

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