4r-18=20+1/5r

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Solution for 4r-18=20+1/5r equation: 


r in (-oo:+oo)

4*r-18 = (1/5)*r+20 // - (1/5)*r+20

4*r-((1/5)*r)-20-18 = 0

4*r+(-1/5)*r-20-18 = 0

19/5*r-38 = 0 // + 38

19/5*r = 38 // : 19/5

r = 38/19/5

r = 10

r = 10

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