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what is 21 = r/3 + 3

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1 Answer

Hi Artavian;
21 = r/3 + 3
I assume this is...
21=(r/3)+3
Let's subtract 3 from both sides...
21-3=(r/3)+3-3
18=r/3
Let's multiply both sides by 3...
(18)(3)=(r/3)(3)
54=r
Let's check our work...
21 = (54/3) + 3
21=18+3
21=21