(2/5)r-9=19

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Solution for (2/5)r-9=19 equation: 


r in (-oo:+oo)

(2/5)*r-9 = 19 // - 19

(2/5)*r-19-9 = 0

2/5*r-28 = 0 // + 28

2/5*r = 28 // : 2/5

r = 28/2/5

r = 70

r = 70

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