(r/2)(0.75)=(100-r/4)(1.25)

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1 Answer

(r/2)(3/4) = (100 - r/4)(5/4)

r(3/8) = (100 - r/4)(5/4)

r(3/8)(4/5) = 100 - r/4

r(15/2) = 100 - r/4

15r/2 = 100 - r/4

30r/4 = 100 - r/4

30r/4 + r/4 = 100

31r/4 = 100

31r = 400

r = 400/31
by Level 13 User (103k points)

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