5r+15=4r-12/4

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Solution for 5r+15=4r-12/4 equation: 


r in (-oo:+oo)

5*r+15 = 4*r-(12/4) // - 4*r-(12/4)

5*r-(4*r)+12/4+15 = 0

5*r-4*r+12/4+15 = 0

r+18 = 0 // - 18

r = -18

r = -18

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