-3=5/2r+12

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Solution for -3=5/2r+12 equation: 


r in (-oo:+oo)

-3 = (5/2)*r+12 // - (5/2)*r+12

-((5/2)*r)-12-3 = 0

(-5/2)*r-12-3 = 0

-5/2*r-15 = 0 // + 15

-5/2*r = 15 // : -5/2

r = 15/(-5/2)

r = -6

r = -6

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