7(2r-1)/5=7r-2/4

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Solution for 7(2r-1)/5=7r-2/4 equation: 


r in (-oo:+oo)

(7*(2*r-1))/5 = 7*r-(2/4) // - 7*r-(2/4)

(7*(2*r-1))/5-(7*r)+2/4 = 0

(7*(2*r-1))/5-7*r+2/4 = 0

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

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

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

5-42*r-14 = 0

-42*r-9 = 0

(-42*r-9)/(2*5) = 0

(-42*r-9)/(2*5) = 0 // * 2*5

-42*r-9 = 0

-42*r-9 = 0 // + 9

-42*r = 9 // : -42

r = 9/(-42)

r = -3/14

r = -3/14

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