Question

If 1/a=1/b+1/c, find a when b=3 and c=2/3

Answer 1

`(1)/(a) =(1)/(b) +(1)/(c) \\ \\(1)/(a) = (1)/(3) + (1)/(2/3) \\\\(1)/(a) = (1)/(3) + (3)/(2)\\\\(1)/(a) = (11)/(6)\\\\a = (6)/(11)`