12+12r^2+12r=13r

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Solution for 12+12r^2+12r=13r equation: 



12+12r^2+12r=13r

We move all terms to the left:

12+12r^2+12r-(13r)=0

We add all the numbers together, and all the variables

12r^2-1r+12=0

a = 12; b = -1; c = +12;
Δ = b2-4ac
Δ = -12-4·12·12
Δ = -575
Delta is less than zero, so there is no solution for the equation

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