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Solve for rr.\newliner+9=90r + 9 = 90\newliner=r = _____\_\_\_\_\_

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Full solution

Q. Solve for rr.\newliner+9=90r + 9 = 90\newliner=r = _____\_\_\_\_\_
  1. Subtract 99: Subtract 99 from both sides to isolate rr. \newliner+9−9=90−9r + 9 - 9 = 90 - 9\newliner=81r = 81

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