3(r/5-5)=-2/5r-20

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Solution for 3(r/5-5)=-2/5r-20 equation: 


r in (-oo:+oo)

3*(r/5-5) = (-2/5)*r-20 // - (-2/5)*r-20

3*(r/5-5)-((-2/5)*r)+20 = 0

3*(r/5-5)+(2/5)*r+20 = 0

3*(1/5*r-5)+(2*r)/5+20 = 0

(3*5*(1/5*r-5))/5+(2*r)/5+(5*20)/5 = 0

3*5*(1/5*r-5)+2*r+5*20 = 0

5*r-75+100 = 0

5*r+25 = 0

(5*r+25)/5 = 0

(5*r+25)/5 = 0 // * 5

5*r+25 = 0

5*r+25 = 0 // - 25

5*r = -25 // : 5

r = -25/5

r = -5

r = -5

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