r/2-1=r/4 - solution

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Solution for r/2-1=r/4 equation:

r in (-oo:+oo)

r/2-1 = r/4 // - r/4

r/2-(r/4)-1 = 0

1/4*r-1 = 0 // + 1

1/4*r = 1 // : 1/4

r = 1/1/4

r = 4

r = 4

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