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c in (-oo:+oo)
6*(8-((4*c)/5))+2*c = 36 // - 36
6*(8-((4*c)/5))+2*c-36 = 0
6*((-4/5)*c+8)+2*c-36 = 0
6*(8-4/5*c)+2*c-36 = 0
6*(8-4/5*c)+2*c-36 = 0
48-14/5*c-36 = 0
12-14/5*c = 0
12-14/5*c = 0
12-14/5*c = 0 // - 12
-14/5*c = -12 // : -14/5
c = -12/(-14/5)
c = 30/7
c = 30/7
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