5=2r-4/2

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Solution for 5=2r-4/2 equation: 


r in (-oo:+oo)

5 = 2*r-(4/2) // - 2*r-(4/2)

4/2-(2*r)+5 = 0

4/2-2*r+5 = 0

7-2*r = 0 // - 7

-2*r = -7 // : -2

r = -7/(-2)

r = 7/2

r = 7/2

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