5/7r-3=2/7r

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Solution for 5/7r-3=2/7r equation: 


r in (-oo:+oo)

(5/7)*r-3 = (2/7)*r // - (2/7)*r

(5/7)*r-((2/7)*r)-3 = 0

(5/7)*r+(-2/7)*r-3 = 0

3/7*r-3 = 0 // + 3

3/7*r = 3 // : 3/7

r = 3/3/7

r = 7

r = 7

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