1=1/2r-2

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


r in (-oo:+oo)

1 = (1/2)*r-2 // - (1/2)*r-2

1-((1/2)*r)+2 = 0

(-1/2)*r+1+2 = 0

3-1/2*r = 0 // - 3

-1/2*r = -3 // : -1/2

r = -3/(-1/2)

r = 6

r = 6

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