7(2r-1)/5=7r-5/2

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Solution for 7(2r-1)/5=7r-5/2 equation: 


r in (-oo:+oo)

(7*(2*r-1))/5 = 7*r-(5/2) // - 7*r-(5/2)

(7*(2*r-1))/5-(7*r)+5/2 = 0

(7*(2*r-1))/5-7*r+5/2 = 0

(2*7*(2*r-1))/(2*5)+(-7*2*5*r)/(2*5)+(5^2)/(2*5) = 0

2*7*(2*r-1)-7*2*5*r+25 = 0

25-42*r-14 = 0

11-42*r = 0

(11-42*r)/(2*5) = 0

(11-42*r)/(2*5) = 0 // * 2*5

11-42*r = 0

11-42*r = 0 // - 11

-42*r = -11 // : -42

r = -11/(-42)

r = 11/42

r = 11/42

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