5r-9+1/2r=3(5-2r)

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Solution for 5r-9+1/2r=3(5-2r) equation: 


r in (-oo:+oo)

5*r+(1/2)*r-9 = 3*(5-(2*r)) // - 3*(5-(2*r))

5*r-(3*(5-(2*r)))+(1/2)*r-9 = 0

5*r-3*(5-2*r)+(1/2)*r-9 = 0

5*r-3*(5-2*r)+r/2-9 = 0

(-3*2*(5-2*r))/2+(2*5*r)/2+r/2+(-9*2)/2 = 0

2*5*r-3*2*(5-2*r)+r-9*2 = 0

22*r+r-30-18 = 0

23*r-30-18 = 0

23*r-48 = 0

(23*r-48)/2 = 0

(23*r-48)/2 = 0 // * 2

23*r-48 = 0

23*r-48 = 0 // + 48

23*r = 48 // : 23

r = 48/23

r = 48/23

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