r/2+2r=7 - solution

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Solution for r/2+2r=7 equation:

r in (-oo:+oo)

r/2+2*r = 7 // - 7

r/2+2*r-7 = 0

5/2*r-7 = 0 // + 7

5/2*r = 7 // : 5/2

r = 7/5/2

r = 14/5

r = 14/5

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