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3r - 8 = 7 + 8r (make rs on 1 side, numbers on other)5r = -15(divide by 5 now)r = -3 (<---Answer)Hope this helped!
r = -3, So the answer would be B)-8 = 7 + 8r - 3r-8 = 7 + 5r-8 - 7 = 5r-15 = 5r-15/5 = r-3 = rr = -3.
