r/2+14=20-r - solution

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Solution for r/2+14=20-r equation:

r in (-oo:+oo)

r/2+14 = 20-r // - 20-r

r/2+r-20+14 = 0

3/2*r-6 = 0 // + 6

3/2*r = 6 // : 3/2

r = 6/3/2

r = 4

r = 4

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