Cho a+3b-c/c=-a+b+3c/a=c-b+3a/b . tính p=(3+a/b)+(3+b/c)=(3+c/a)

cho a+3b-c/c=-a+b+3c/a=c-b+3a/b . tính p=(3+a/b)+(3+b/c)=(3+c/a)