r/2+4r=27 - solution

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Solution for r/2+4r=27 equation:

r in (-oo:+oo)

r/2+4*r = 27 // - 27

r/2+4*r-27 = 0

9/2*r-27 = 0 // + 27

9/2*r = 27 // : 9/2

r = 27/9/2

r = 6

r = 6

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