Ответы и объяснения

2016-08-15T00:48:17+00:00
(4c+7)/(3c+3)+(3c-8)/(3c+5)=
=(12c²+21c+20c+35+9c²+9c-24c-24)/(3c+3)(3c+5)=
=(21c²+26c+11)/(3c+3)(3c+50