-1/2r-12=-27

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Solution for -1/2r-12=-27 equation: 


r in (-oo:+oo)

(-1/2)*r-12 = -27 // + 27

(-1/2)*r-12+27 = 0

15-1/2*r = 0 // - 15

-1/2*r = -15 // : -1/2

r = -15/(-1/2)

r = 30

r = 30

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