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x in (-oo:+oo)
2*((3/4)*r-1)+1*l^2*r = (1/4)*r+6 // - (1/4)*r+6
2*((3/4)*r-1)+1*l^2*r-((1/4)*r)-6 = 0
2*((3/4)*r-1)+l^2*r+(-1/4)*r-6 = 0
2*(3/4*r-1)+l^2*r-r/4-6 = 0
(2*4*(3/4*r-1))/4+(4*l^2*r)/4-r/4+(-6*4)/4 = 0
2*4*(3/4*r-1)+4*l^2*r-r-6*4 = 0
6*r+4*l^2*r-r-24-8 = 0
4*l^2*r+5*r-24-8 = 0
4*l^2*r+5*r-32 = 0
(4*l^2*r+5*r-32)/4 = 0
(4*l^2*r+5*r-32)/4 = 0 // * 4
4*l^2*r+5*r-32 = 0
x belongs to the empty set
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