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a in (-oo:+oo)
6*(6-(2*a)) = 27*a-((3/2)*(4*a+6)) // - 27*a-((3/2)*(4*a+6))
6*(6-(2*a))+(3/2)*(4*a+6)-(27*a) = 0
6*(6-2*a)+(3/2)*(4*a+6)-27*a = 0
6*(6-2*a)+3/2*(4*a+6)-27*a = 0
6*(6-2*a)+3/2*(4*a+6)-27*a = 0
45-6*a-27*a = 0
45-33*a = 0
45-33*a = 0
45-33*a = 0 // - 45
-33*a = -45 // : -33
a = -45/(-33)
a = 15/11
a = 15/11
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