18+9/4r=-18

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Solution for 18+9/4r=-18 equation: 


r in (-oo:+oo)

(9/4)*r+18 = -18 // + 18

(9/4)*r+18+18 = 0

9/4*r+36 = 0 // - 36

9/4*r = -36 // : 9/4

r = -36/9/4

r = -16

r = -16

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