Question

2\r=1/r-1/r+3 what's the answer?

Answer 1

`(2)/(r)=(1)/(r)-(1)/(r+3);\ D:r\\eq0\ \wedge\ r\\eq-3\\\\(2)/(r)-(1)/(r)=(-1)/(r+3)\\\\(1)/(r)=(-1)/(r+3)\\\\cross\ multiply\\\\r+3=-r\\\\r+r=-3\\\\2r=-3\\\\\boxed{r=-1.5}`

Answer 2

`(2)/(r) = (1)/(r) -(1)/(r)+3\ \ \ and\ \ \ r \\eq 0\\\\ (2)/(r) =3\ /\cdot r\\\\2=3r\ /:3\\\\ (2)/(3) =r`