r/2+r/3=20 - solution

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Solution for r/2+r/3=20 equation:

r in (-oo:+oo)

r/2+r/3 = 20 // - 20

r/2+r/3-20 = 0

5/6*r-20 = 0 // + 20

5/6*r = 20 // : 5/6

r = 20/5/6

r = 24

r = 24

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