(3r+12)/2=4r

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Solution for (3r+12)/2=4r equation: 


r in (-oo:+oo)

(3*r+12)/2 = 4*r // - 4*r

(3*r+12)/2-(4*r) = 0

(3*r+12)/2-4*r = 0

(3*r+12)/2+(-4*2*r)/2 = 0

3*r-4*2*r+12 = 0

12-5*r = 0

(12-5*r)/2 = 0

(12-5*r)/2 = 0 // * 2

12-5*r = 0

12-5*r = 0 // - 12

-5*r = -12 // : -5

r = -12/(-5)

r = 12/5

r = 12/5

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