105(4r-5)=180

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Solution for 105(4r-5)=180 equation: 



105(4r-5)=180

We move all terms to the left:

105(4r-5)-(180)=0

We multiply parentheses

420r-525-180=0

We add all the numbers together, and all the variables

420r-705=0

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

420r=705

r=705/420

r=1+19/28

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